Perhaps you should try some spelling variations:
network synthesis » network systems
where synthesis » heme synthesis, when synthesis, wire synthesis
health science » health sciences
head impedance » head impedances, load impedance, end impedance
science where » science what
dence network » dense network, defence network, dense networks
health dence » health device, health evidence, health devices

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 science where synthesis report ) OR ( health dence network synthesis report ))) OR ( head impedance network synthesis report )).
• Adding a wildcard symbol may retrieve word variants: (((( health science where synthesis report ) or ( health dence network synthesis report ))) or ( head impedance network synthesis report ))*.