Perhaps you should try some spelling variations:
network synthesis » network systems
sciences network » services network
guidance network » guide network, finance network, impedance network
science network » science networks, science work, sequence networks
systems support » system support, systems supporting, system supporting
health guidance » health evidence, health finance, health substance
dence network » dense network, defence network, dense networks
health guido » health guide, health grid, health guiding
health gindo » health mind, health linda, health gender

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