Perhaps you should try some spelling variations:
"health substance network synthesis report" » "health distance network synthesis report", "health substrate network synthesis report", "health resistance network synthesis report"
"health science network synthesis report" » "health sciences network synthesis report", "health science networks synthesis report", "health science work synthesis report"
"head impedance network systems report" » "head impedances network systems report", "load impedance network systems report", "end impedance network systems report", "head impedance network system report", "head impedance network systems support", "head impedance network systems recent"
"health dence network synthesis report" » "health dense network synthesis report", "health defence network synthesis report", "health dense networks synthesis report", "health device network synthesis report", "health evidence network synthesis report", "health devices network synthesis report"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"health science network synthesis report\") OR (\"health dence network synthesis report\"))) OR (((\"health substance network synthesis report\") OR (\"head impedance network systems report\"))))".
• Removing quotes may allow a broader search: (((( health science network synthesis report ) OR ( health dence network synthesis report ))) OR ((( health substance network synthesis report ) OR ( head impedance network systems report )))).
• Adding a wildcard symbol may retrieve word variants: (((("health science network synthesis report") OR ("health dence network synthesis report"))) OR ((("health substance network synthesis report") OR ("head impedance network systems report"))))*.