Perhaps you should try some spelling variations:
network synthesis » network systems
substance network » distance network, substrate network, resistance network
evidence network » science network, guidance network, dence network
health evidence » health science
network system » network systems, networked systems
system report » system support, system 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 substance network system report ) OR ( health substance network system reform )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( health evidence network synthesis report ) or ((( health substance network system report ) OR ( health substance network system reform ))))".
• Adding a wildcard symbol may retrieve word variants: (( health evidence network synthesis report ) or ((( health substance network system report ) OR ( health substance network system reform ))))*.