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
hybrid network » hybrid networks
grid network » grid networks, world 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 systems recent ) OR ((( health guidance network synthesis report ) OR ( health ((grid network) OR (hybrid 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 network) OR (hybrid network)) synthesis report ))))*".