Maybe I need to be a bit clearer on the terminology.. however;
the search option in the 'candidates' module only searches particular fields - not a full-text search of the entire entry. I'd have to go check the code to see which fields it searches, but I'm pretty certain it's only first-name/last name etc.
You can search other fields by using the filter option - i.e. choose a filter for location, and then search for the location that you're after.
for full text searching you need to have the correct dependencies installed - which are articulated here:
http://www.opencats.org/documentation/O ... -_In_Depth
...and then as you grow the number of resume's (or C.V's) that you have, you can install sphinx to accelerate the full text search and (optionally) support boolean search operators.