Perhaps you should try some spelling variations:
assistance network » assistance networked, resistance network, assistant network
health assistance » health substance, cash assistance
evidence network » science network, guidance network, dence network
distance network » distance networks, resistance network, disease network
health evidence » health science
health distance » healthy distance, earth distance, health resistance
systems report » system report, systems support, systems recent

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: (( health evidence network synthesis report ) OR ((( health distance network systems report ) OR ( health assistance network systems report )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( health evidence network synthesis report ) or ((( health distance network systems report ) OR ( health assistance network systems report ))))".
• Adding a wildcard symbol may retrieve word variants: (( health evidence network synthesis report ) or ((( health distance network systems report ) OR ( health assistance network systems report ))))*.