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

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