Perhaps you should try some spelling variations:
network synthesis » network systems
sciences network » services network
defence network » defense network, defenses network, defense networks
science network » science networks, science work, sequence networks
systems support » system support, systems supporting, system supporting
health guidance » health evidence, health substance
health finance » health financing, health insurance
mode network » model network, models network, core network
health mode » health model, health code, health more

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