Perhaps you should try some spelling variations:
network synthesis » network systems
evidence network » guidance network, dence network, evidence work
health evidence » health science
science network » sciences network, science networks, science work
health guide » health guido, earth guide, health side
health grid » health guido, health good, health hybrid
health gis » health gains, health gods, health gap

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 evidence network synthesis report ) OR ( ((health guide) OR (((health grid) OR (health gis)))) 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 evidence network synthesis report ) or ( ((health guide) or (((health grid) OR (health gis)))) network synthesis report ))))".
• Adding a wildcard symbol may retrieve word variants: (( health ((evidence network) or (science network)) systems recent ) or ((( health evidence network synthesis report ) or ( ((health guide) or (((health grid) OR (health gis)))) network synthesis report ))))*.