Perhaps you should try some spelling variations:
assurance networks » alliance networks, distance networks, source networks
insurance networks » inference networks, insurance works, inheritance networks
network synthesis » network systems
assurance network » assurance author, assurance between, distance network
evidence network » science network, guidance network, dence network
health evidence » health science

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