Perhaps you should try some spelling variations:
evidence network » science network, dence network, incidence networks
guidance network » guide network, finance network, impedance network
health evidence » health science
health guidance » health finance, health substance
health grid » health guide, health guido, health good
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 systems recent ) OR ((( health guidance network synthesis report ) 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 systems recent ) or ((( health guidance network synthesis report ) or ( ((health grid) OR (health gis)) network synthesis report ))))".
• Adding a wildcard symbol may retrieve word variants: (( health evidence network systems recent ) or ((( health guidance network synthesis report ) or ( ((health grid) OR (health gis)) network synthesis report ))))*.