Perhaps you should try some spelling variations:
networks synthesis » networks systems, nets synthesis
distance networks » resistance network, state networks, alliance networks
network synthesis » network systems
evidence network » science network, guidance network, dence network
healthy distance » health assistance, health resistance, healthy districts
distance network » resistance network, disease network, finance network
health evidence » health science

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 ((( healthy distance network synthesis report ) OR ( healthy distance networks synthesis report )))).
• Adding a wildcard symbol may retrieve word variants: (( health evidence network synthesis report ) or ((( healthy distance network synthesis report ) or ( healthy distance networks synthesis report ))))*.