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

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)) networks synthesis report ) OR ( ((health guidance) OR (health evidence)) network synthesis report )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((health incidence) or (death incidence)) networks synthesis report ) or ( ((health guidance) OR (health evidence)) network synthesis report ))".
• Adding a wildcard symbol may retrieve word variants: (( ((health incidence) or (death incidence)) networks synthesis report ) or ( ((health guidance) OR (health evidence)) network synthesis report ))*.