Perhaps you should try some spelling variations:
health impedance » health importance, health temperance, head impedance
health sciences » earth sciences
shock synthesis » theory synthesis
work synthesis » world synthesis, walk synthesis, network synthesis
impedance net » impedance cones, impedance input, impedance cone

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 sciences ((work synthesis) OR (shock synthesis)) report ) OR ( health impedance net((work synthesis) OR (shock synthesis)) report ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( health sciences ((work synthesis) OR (shock synthesis)) report ) or ( health impedance net((work synthesis) OR (shock synthesis)) report ))*".