Perhaps you should try some spelling variations:
network synthesis » network systems
health incidence » health incident, health science, health evidence
guidance network » guide network, finance network, impedance network
death incidence » disease incidence, growth incidence, dengue incidence
health guidance » health evidence, health finance, health substance
nets synthesis » net synthesis, dots synthesis, its synthesis

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