Perhaps you should try some spelling variations:
health importance » health insurance
health incidence » death incidence, health incident, health science
health impedance » health temperance, head impedance, health imperative
incidence nets » incidence des, incidence les, incidence costs
nets synthesis » net synthesis, dots synthesis, its 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 incidence nets synthesis report ) OR ( ((health impedance) OR (health importance)) ((network synthesis) OR (network systems)) report )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( health incidence nets synthesis report ) or ( ((health impedance) OR (health importance)) ((network synthesis) or (network systems)) report ))".
• Adding a wildcard symbol may retrieve word variants: (( health incidence nets synthesis report ) or ( ((health impedance) OR (health importance)) ((network synthesis) or (network systems)) report ))*.