Perhaps you should try some spelling variations:
22radiation injuries » radiation injury, friction injuries, rotation injuries
radiation injuries » radiation injury
tnf therapy » vegf therapy
2f therapy » 2 therapy, rf therapy, 2.2 therapy
amputation » imputation, computation, reputation

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 (radiation induced))) OR (amputation injuries))) OR (radiation injuries)) %((2f therapy) OR (tnf therapy))%22.
• Adding a wildcard symbol may retrieve word variants: %((((((22radiation injuries) or (radiation induced))) or (amputation injuries))) or (radiation injuries)) %((2f therapy) or (tnf therapy))%22*.