Perhaps you should try some spelling variations:
networks synthesis » network synthesis, nets synthesis
health incidence » death incidence, health incident, health science
networks systems » networks system, networked systems, network system
health impedance » health importance, health temperance, head impedance
systems report » system report, systems support, systems recent

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