Perhaps you should try some spelling variations:
22radiation injuries » radiation injury, friction injuries, rotation injuries
imputation injuries » amputation injuries, imputation indexes, luxation injuries
radiation injuries » radiation injury, radiation induced
2f therapy » 2 therapy, tnf therapy, 2.2 therapy
rf therapy » tnf therapy, brief therapy, grief therapy

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