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
defence network » defense network, defenses network, defense networks
health sciences » earth sciences
health guidance » health finance, health substance
health defence » health adherence, health reference, health terrence

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