Perhaps you should try some spelling variations:
network synthesis » network systems
health incidence » health incident, health science, health evidence
networks systems » network systems, networks system, networked systems
death incidence » disease incidence, growth incidence, dengue incidence
systems report » system report, systems support, systems recent
grid network » grid networks, hybrid network, world network
health grid » health guide, health guido, health gis

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