Perhaps you should try some spelling variations:
historical studies » historical survey
sequence networks » frequency networks, sequential networks, influence networks
science network » sciences network, science networks, science work

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: ((sequence networks) OR (science network)). historical studies.
• Adding a wildcard symbol may retrieve word variants: ((sequence networks) or (science network)). historical studies*.