Perhaps you should try some spelling variations:
"health guidance network synthesis report" » "health guide network synthesis report", "health finance network synthesis report", "health guided network synthesis report", "health evidence network synthesis report", "health substance network synthesis report"
"health science network systems report" » "health sciences network systems report", "health science networks systems report", "health science work systems report", "health science network system report", "health science network systems support", "health science network systems recent"
"head impedance network synthesis report" » "head impedances network synthesis report", "load impedance network synthesis report", "end impedance network synthesis report"
"health dense network synthesis report" » "health dense networks synthesis report", "healthy sense network synthesis report", "health disease network synthesis report", "health device 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 systems report\") OR (\"health dense network synthesis report\"))) OR (((\"health guidance network synthesis report\") OR (\"head impedance network synthesis report\"))))".
• Removing quotes may allow a broader search: (((( health science network systems report ) OR ( health dense network synthesis report ))) OR ((( health guidance network synthesis report ) OR ( head impedance network synthesis report )))).
• Adding a wildcard symbol may retrieve word variants: (((("health science network systems report") OR ("health dense network synthesis report"))) OR ((("health guidance network synthesis report") OR ("head impedance network synthesis report"))))*.