Perhaps you should try some spelling variations:
prisoners delivered » prisons delivered, prisoners derived, mariners delivered
derived elements » defined elements, retrieved elements, curved elements
press derived » stress derived, pores derived, prey derived
2 prisoners » 12 prisoners, _ prisoners, 8 prisoners
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: (( 2 prisoners delivered placenta ) OR ( get press derived elements )).
• Adding a wildcard symbol may retrieve word variants: (( 2 prisoners delivered placenta ) or ( get press derived elements ))*.