Perhaps you should try some spelling variations:
network synthesis » network systems
evidence network » guidance network, dence network, incidence networks
health evidence » health science
science network » sciences network, science networks, science work
health guidance » health finance, health substance
systems report » system report, systems support, systems recent
health guide » health guido, health side, health guiding
earth guide » search guide, bath guide, earth tide
health grid » health guido, health gis, health good

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