Perhaps you should try some spelling variations:
networks synthesis » networks systems, nets synthesis
substance network » distance network, substrate network, resistance network
network synthesis » network systems
health incidence » health science, health evidence, path incidence
health incident » health including
death incidence » disease incidence, growth incidence, dengue incidence

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 incidence) OR (health incident))) OR (death incidence)) networks synthesis report ) OR ( health substance network synthesis report )).
• Adding a wildcard symbol may retrieve word variants: (( ((((health incidence) or (health incident))) or (death incidence)) networks synthesis report ) or ( health substance network synthesis report ))*.