Perhaps you should try some spelling variations:
techniques paper » techniques upper, techniques peter, techniques pattern
ai technical » api technical, ii technical, i technical
world basic » world music, world bicssc
work ai » work a, work all, work als

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( world basic techniques paper ) OR ( work ai technical papers ))*.