Perhaps you should try some spelling variations:
health incidence » health incident, health science, health evidence
networks systems » networks system, networked systems, network system
death incidence » growth incidence, dengue incidence, graphs incidence
guide network » guided network, side network, wide network
health guide » health guido, earth guide, health grid

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