Perhaps you should try some spelling variations:
evidence network » science network, dence network, incidence networks
guidance network » finance network, guided network, science network
health impedance » health importance, health temperance, head impedance
health evidence » health science
guide network » guided network, side network, wide network

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