Perhaps you should try some spelling variations:
network synthesis » network systems
evidence network » science network, guidance network, incidence networks
systems support » system support, systems supporting, system supporting
health guidance » health evidence, health finance
dence network » dense network, defence network, dense networks
side network » wide network, inside network, guide network
health side » health site, health inside, health some

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