Perhaps you should try some spelling variations:
22radiation injuries » radiation injury, friction injuries, rotation injuries
radiation injuries » radiation injury, radiation induced
rf therapy » tnf therapy, brief therapy, grief therapy
amputation » imputation, computation, computations

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 ((amputation OR reputation) injuries))) OR (radiation injuries)) %rf therapy%22.
• Adding a wildcard symbol may retrieve word variants: %((((22radiation injuries) or ((amputation or reputation) injuries))) or (radiation injuries)) %rf therapy%22*.