Perhaps you should try some spelling variations:
network synthesis » network systems
evidence network » dence network, incidence networks, resilience network
guidance network » guide network, finance network, impedance network
science network » sciences network, science networks, science work
health guidance » health evidence, health finance, health substance
grid network » grid networks, hybrid network, world network
health grid » health guide, health guido, health gis

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