Perhaps you should try some spelling variations:
prisoners delivered » prisons delivered, prisoners derived, mariners delivered
prefixed elements » defined elements, mixed elements
press prefixed » address prefixed, pressure fixed, price prefixed
get press » get process, great press, cert press

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: (( _ prisoners delivered placenta ) OR ( get press prefixed elements )).
• Adding a wildcard symbol may retrieve word variants: (( _ prisoners delivered placenta ) or ( get press prefixed elements ))*.