Perhaps you should try some spelling variations:
booleans working » booleans strings, boolean masking, boolean ring
world booleans » world oceans, words boolean, world bowles's
binding paper » bending paper, building paper, binding peer
based binding » based building, based funding, based biosensing
word based » work based, card based, keyword based

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: (( word based binding paper ) OR ( world booleans working paper )).
• Adding a wildcard symbol may retrieve word variants: (( word based binding paper ) or ( world booleans working paper ))*.