Configuring Oracle AWR reports
You can use DBA_HIST_SQL_PLAN view to get the execution plan for SQL statement. In order to include more SQLs in your report you have to change AWR setting as shown below. 

BEGIN
DBMS_WORKLOAD_REPOSITORY.MODIFY_SNAPSHORT_SETTINGS(
RETENTION =&gt; 7200,
INTERVAL =&gt;60 ,
TOPNSQL =&gt;10 , --Here you can define the number of SQL to collect at each AWR snapsho
DBID =&gt; 123661118);
END;
/


You can get the SQL_ID from the AWR reports and can get their execution plan as shown below:

SQL&gt;select plan_table_output from table (dbms_xplan.display_awr('&amp;SQLID'));

Another way is to use Oracle supplied script called awrsqrpt.sql which can be found under $ORACLE_HOME/rdbms/admin directory. 
During the execution of the script it asks for the SQL_ID for which you want to get the execution plan. 

References:

MODIFY_SNAPSHOT_SETTINGS Procedures
DBA_HIST_SQL_PLAN
How to Control the Number of SQL Statements and other information displayed in AWR Report (Doc ID 1357637.1)