Perhaps you should try some spelling variations:
networks synthesis » networks systems, nets synthesis
network synthesis » network systems
sequence networks » frequency networks, sequential networks, influence networks
substance network » distance network, substrate network, resistance network
evidence network » science network, guidance network, dence network
health evidence » health science
heart sequence » heart sequences, charts sequence, header sequence

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 ( heart sequence networks synthesis report ))) OR ( health substance network synthesis report )).
• Adding a wildcard symbol may retrieve word variants: (((( health evidence network synthesis report ) or ( heart sequence networks synthesis report ))) or ( health substance network synthesis report ))*.