Answering to your last comment.
There are two ways this can be achieved.
1. Numeric event: Set up a custom event and pass the number of search results along with the keywords in the evar. This will give you The aggregate of the total results for specific keywords. For example: user A searched key word XYZ and there were total 3 results. Another user B searches for the same key word and receives 4 results. The report will show:
evar2 event2
XYZ 7
2. Evar: Set up an evar (say evar3) to track the number of results. This will allow you to do a break down of keywords by the number of results. Going by the above example, the report will show:
evar2 Occurences
XYZ 2
ever3 2
3 1
4 1
Or you can use the combination of the above two, giving you more insights on the search results. Hope that Helps.