Perhaps you should try some spelling variations:
22radiation injuries » radiation injury, friction injuries
radiation injuries » radiation injury, radiation induced
rotation injuries » luxation injuries, motion injuries, amputation injuries
tnf therapy » vegf therapy
2f therapy » 2.2 therapy, 2.3 therapy, 2.4 therapy
rf therapy » brief therapy, grief therapy, vegf therapy
2 therapy » 2 therapie

Try widening your search to All Fields.

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: %((((22radiation injuries) OR (rotation injuries))) OR (radiation injuries)) %((((2f therapy) OR (((rf therapy) OR (tnf therapy))))) OR (2 therapy))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((((22radiation injuries) or (rotation injuries))) or (radiation injuries)) %((((2f therapy) or (((rf therapy) OR (tnf therapy))))) or (2 therapy))%22".
• Adding a wildcard symbol may retrieve word variants: %((((22radiation injuries) or (rotation injuries))) or (radiation injuries)) %((((2f therapy) or (((rf therapy) OR (tnf therapy))))) or (2 therapy))%22*.