Perhaps you should try some spelling variations:
network synthesis » network systems
substance network » distance network, substrate network, resistance network
evidence network » science network, dence network, incidence networks
guidance network » guide network, finance network, impedance network
health evidence » health science
health guidance » health finance

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 evidence network synthesis report ) OR ( health guidance network synthesis report ))) OR ( health substance network synthesis report ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( health evidence network synthesis report ) OR ( health guidance network synthesis report ))) or ( health substance network synthesis report ))*".