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
distance network » distance networks, resistance network, disease network
health evidence » health science
health guidance » health finance, health substance
health distance » healthy distance, health assistance, health resistance
earth distance » search distance, path distance, garch distance

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