Perhaps you should try some spelling variations:
occurrence networks » occurrence network, occurrence nets
sequential network » sequential networks
substance network » distance network, substrate network, resistance network
science networks » sciences network, sequence networks, science works
science network » sciences network, science work, sequence networks
systems report » system report, systems support, systems recent

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 ((science network) OR (science networks)) systems report ) OR ( health ((occurrence networks) OR (sequential network)) systems report ))) OR ( health substance network systems report )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( health ((science network) OR (science networks)) systems report ) or ( health ((occurrence networks) or (sequential network)) systems report ))) or ( health substance network systems report ))".
• Adding a wildcard symbol may retrieve word variants: (((( health ((science network) OR (science networks)) systems report ) or ( health ((occurrence networks) or (sequential network)) systems report ))) or ( health substance network systems report ))*.