Perhaps you should try some spelling variations:
networks synthesis » networks systems
network synthesis » network systems
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 assistance
nets synthesis » net synthesis, dots synthesis, its synthesis

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