Perhaps you should try some spelling variations:
network synthesis » network systems
evidence network » dence network, incidence networks, resilience network
science networks » sciences network, sequence networks, science works
guidance network » guide network, finance network, impedance network
health evidence » health science
science network » sciences network, science work, sequence networks
health guidance » health finance, health substance

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