Perhaps you should try some spelling variations:
networks synthesis » networks systems, nets synthesis
health impedance » health importance, health temperance, head impedance
death influence » hemath influence, deans influence, earth influence
heart influence » secret influence, what influence, impact 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: (( ((death influence) OR (heart influence)) networks synthesis report ) OR ( health impedance ((network synthesis) OR (network systems)) report )).
• Adding a wildcard symbol may retrieve word variants: (( ((death influence) or (heart influence)) networks synthesis report ) or ( health impedance ((network synthesis) or (network systems)) report ))*.