Perhaps you should try some spelling variations:
network synthesis » network systems
health incidence » health incident, health science, health evidence
death incidence » growth incidence, dengue incidence
nets synthesis » net synthesis, dots synthesis, its synthesis
health guide » earth guide, health grid, health side
health guido » health gindo, health grid, health guiding

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