Perhaps you should try some spelling variations:
networks synthesis » networks systems, nets synthesis
network synthesis » network systems
evidence network » guidance network, dence network, incidence networks
defense networks » defense network, dense networks, defenses network
science network » sciences network, science networks, science work
health guidance » health finance
health defense » health biodefense, health disease, depth defense
health science » health sciences

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