Perhaps you should try some spelling variations:
networks synthesis » networks systems, nets synthesis
health influence » heart influence, death influence, hemath influence
health impedance » health importance, health temperance, head impedance
earth influence » heart influence, early influence, carta influence
birth influence » high influence, pitch influence, british influence

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