22. The method of claim 14 , further comprising: (g) sending by the search engine to the client application second suggested search query refinements, each of the second suggested search query refinements corresponding to a further-refined search query including the at least one first search term, the at least one first additional search term, and at least one further additional search term, and instructions for displaying, apart from the search bar and apart from the first suggested search query refinements, the second suggested search query refinements, the second suggested search query refinements being selectable by a user via at least one second graphical object; (h) effecting by the search engine a further-refined search in respect of a further-refined search query including the at least one first search term, the at least one first additional search term, and at least one further additional search term, the further-refined search yielding further-refined search results; and (i) sending by the search engine to the client application the further-refined search results and instructions for displaying at least one further-refined search result and a visual representation of a refinement relationship between the first search query, the first refined search query, and the further-refined search query.
22. The method of claim 14 , further comprising: (g) sending by the search engine to the client application second suggested search query refinements, each of the second suggested search query refinements corresponding to a further-refined search query including the at least one first search term, the at least one first additional search term, and at least one further additional search term, and instructions for displaying, apart from the search bar and apart from the first suggested search query refinements, the second suggested search query refinements, the second suggested search query refinements being selectable by a user via at least one second graphical object; (h) effecting by the search engine a further-refined search in respect of a further-refined search query including the at least one first search term, the at least one first additional search term, and at least one further additional search term, the further-refined search yielding further-refined search results; and (i) sending by the search engine to the client application the further-refined search results and instructions for displaying at least one further-refined search result and a visual representation of a refinement relationship between the first search query, the first refined search query, and the further-refined search query. 23. The method of claim 22 , wherein: (d) includes sending by the search engine to the client application instructions for displaying a first plurality of buttons selectable by a user, each button in the first plurality of buttons corresponding to one of the first suggested search query refinements and including text representative of that suggested search query refinement; and (g) includes sending by the search engine to the client application instructions for displaying, apart from the first plurality of buttons, a second plurality of buttons selectable by a user, each button in the second plurality of buttons corresponding to one of the second suggested search query refinements and including text representative of that suggested search query refinement.