Perhaps you should try some spelling variations:
network synthesis » network systems
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
device network » service network, service networks, services network
health device » health service, health services
health guido » health guide, health gindo, health guiding
health grid » health guide, 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 synthesis report ) OR ( health device network synthesis report ))) OR ((( health guidance network synthesis report ) OR ( ((health grid) OR (health guido)) network synthesis report )))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( health evidence network synthesis report ) or ( health device network synthesis report ))) or ((( health guidance network synthesis report ) or ( ((health grid) OR (health guido)) network synthesis report ))))".
• Adding a wildcard symbol may retrieve word variants: (((( health evidence network synthesis report ) or ( health device network synthesis report ))) or ((( health guidance network synthesis report ) or ( ((health grid) OR (health guido)) network synthesis report ))))*.