Perhaps you should try some spelling variations:
"medical ethical review" » "medicine ethical review", "medical clinical review", "medical surgical review", "medical technical review", "medical empirical review"
"medical ethics reviews" » "medical ethics review", "medical third reviews"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"medical ethics reviews\") OR (\"medical ethical review\"))".
• Removing quotes may allow a broader search: (( medical ethics reviews ) OR ( medical ethical review )).
• Adding a wildcard symbol may retrieve word variants: (("medical ethics reviews") OR ("medical ethical review"))*.