Perhaps you should try some spelling variations:
network synthesis » network systems
evidence network » science network, guidance network, dence network
health sciences » earth sciences
guide network » guided network, side network, wide network
health guide » health guido, earth guide, health grid

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