Combine Two Folders with Smart Folder
check the code below and I will explain
    &lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
&lt;!DOCTYPE plist PUBLIC &quot;-//Apple//DTD PLIST 1.0//EN&quot; &quot;http://www.apple.com/DTDs/PropertyList-1.0.dtd&quot;&gt;
&lt;plist version=&quot;1.0&quot;&gt;
&lt;dict&gt;
    &lt;key&gt;CompatibleVersion&lt;/key&gt;
    &lt;integer&gt;1&lt;/integer&gt;
    &lt;key&gt;RawQuery&lt;/key&gt;
    &lt;string&gt;(((kMDItemKind == &quot;Application&quot;cd &amp;amp;&amp;amp; ! ( ((kMDItemDisplayName == &quot;*aam*&quot;cd || kMDItemAlternateNames == &quot;*aam*&quot;cd) || (kMDItemDisplayName == &quot;*aas*&quot;cd || kMDItemAlternateNames == &quot;*aas*&quot;cd) || (kMDItemDisplayName == &quot;*lic*&quot;cd || kMDItemAlternateNames == &quot;*lic*&quot;cd) || (kMDItemDisplayName == &quot;*uninstall*&quot;cd || kMDItemAlternateNames == &quot;*uninstall*&quot;cd) || (kMDItemDisplayName == &quot;*setup*&quot;cd || kMDItemAlternateNames == &quot;*setup*&quot;cd) || (kMDItemDisplayName == &quot;*install*&quot;cd || kMDItemAlternateNames == &quot;*install*&quot;cd)) ))))&lt;/string&gt;
    &lt;key&gt;RawQueryDict&lt;/key&gt;
    &lt;dict&gt;
        &lt;key&gt;FinderFilesOnly&lt;/key&gt;
        &lt;false/&gt;
        &lt;key&gt;RawQuery&lt;/key&gt;
        &lt;string&gt;(((kMDItemKind == &quot;Application&quot;cd &amp;amp;&amp;amp; ! ( ((kMDItemDisplayName == &quot;*aam*&quot;cd || kMDItemAlternateNames == &quot;*aam*&quot;cd) || (kMDItemDisplayName == &quot;*aas*&quot;cd || kMDItemAlternateNames == &quot;*aas*&quot;cd) || (kMDItemDisplayName == &quot;*lic*&quot;cd || kMDItemAlternateNames == &quot;*lic*&quot;cd) || (kMDItemDisplayName == &quot;*uninstall*&quot;cd || kMDItemAlternateNames == &quot;*uninstall*&quot;cd) || (kMDItemDisplayName == &quot;*setup*&quot;cd || kMDItemAlternateNames == &quot;*setup*&quot;cd) || (kMDItemDisplayName == &quot;*install*&quot;cd || kMDItemAlternateNames == &quot;*install*&quot;cd)) ))))&lt;/string&gt;
        &lt;key&gt;SearchScopes&lt;/key&gt;
        &lt;array&gt;
            &lt;string&gt;/System/Applications&lt;/string&gt;
            &lt;string&gt;/Applications&lt;/string&gt;
            &lt;string&gt;/Users/USERNAME/Applications&lt;/string&gt;
        &lt;/array&gt;
        &lt;key&gt;UserFilesOnly&lt;/key&gt;
        &lt;false/&gt;
    &lt;/dict&gt;
    &lt;key&gt;SearchCriteria&lt;/key&gt;
    &lt;dict&gt;
        &lt;key&gt;FXCriteriaSlices&lt;/key&gt;
        &lt;array&gt;
            &lt;dict&gt;
                &lt;key&gt;criteria&lt;/key&gt;
                &lt;array&gt;
                    &lt;string&gt;com_apple_RawQueryAttribute&lt;/string&gt;
                    &lt;integer&gt;104&lt;/integer&gt;
                &lt;/array&gt;
                &lt;key&gt;displayValues&lt;/key&gt;
                &lt;array&gt;
                    &lt;string&gt;Raw query&lt;/string&gt;
                    &lt;string&gt;(kMDItemKind == &quot;Application&quot;cd &amp;amp;&amp;amp; ! ( ((kMDItemDisplayName == &quot;*aam*&quot;cd || kMDItemAlternateNames == &quot;*aam*&quot;cd) || (kMDItemDisplayName == &quot;*aas*&quot;cd || kMDItemAlternateNames == &quot;*aas*&quot;cd) || (kMDItemDisplayName == &quot;*lic*&quot;cd || kMDItemAlternateNames == &quot;*lic*&quot;cd) || (kMDItemDisplayName == &quot;*uninstall*&quot;cd || kMDItemAlternateNames == &quot;*uninstall*&quot;cd) || (kMDItemDisplayName == &quot;*setup*&quot;cd || kMDItemAlternateNames == &quot;*setup*&quot;cd) || (kMDItemDisplayName == &quot;*install*&quot;cd || kMDItemAlternateNames == &quot;*install*&quot;cd)) ))&lt;/string&gt;
                &lt;/array&gt;
                &lt;key&gt;rowType&lt;/key&gt;
                &lt;integer&gt;0&lt;/integer&gt;
                &lt;key&gt;subrows&lt;/key&gt;
                &lt;array/&gt;
            &lt;/dict&gt;
        &lt;/array&gt;
        &lt;key&gt;FXScopeArrayOfPaths&lt;/key&gt;
        &lt;array&gt;
            &lt;string&gt;/System/Applications&lt;/string&gt;
            &lt;string&gt;/Applications&lt;/string&gt;
            &lt;string&gt;/Users/USERNAME/Applications&lt;/string&gt;
        &lt;/array&gt;
    &lt;/dict&gt;
&lt;/dict&gt;
&lt;/plist&gt;

If you see the key SearchScopes then there you can add what paths to include.
So simple as that - then it can be done. To learn this I used HoudaSpot that saved it for me so I could learn how to set it up. So basically just open a pre-saved .savedSearch file and edit the contents with SearchScope key.