Perhaps you should try some spelling variations:
network synthesis » network systems
networked systems » network systems
health science » health sciences
network system » network systems
head impedance » head impedances, load impedance, end impedance
health dense » healthy sense, health disease, health device

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