Perhaps you should try some spelling variations:
health influence » heart influence, death influence, hemath influence
health impedance » health importance, health temperance, head impedance
earth influence » heart influence, early influence, birth influence
net synthesis » direct synthesis

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)) net synthesis report ) OR ( health impedance ((network synthesis) OR (network systems)) report )).
• Adding a wildcard symbol may retrieve word variants: (( ((health influence) or (earth influence)) net synthesis report ) or ( health impedance ((network synthesis) or (network systems)) report ))*.