Perhaps you should try some spelling variations:
coastal environments » virtual environments, natural environments
hostile environment » hostile environments, mobile environment, hospital environment
coastal environment » total environment
digital environment » virtual environment, total environment

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: ((hostile environment) OR (((((coastal environment) OR (coastal environments))) OR (digital environment)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hostile environment) or (((((coastal environment) OR (coastal environments))) or (digital environment))))".
• Adding a wildcard symbol may retrieve word variants: ((hostile environment) or (((((coastal environment) OR (coastal environments))) or (digital environment))))*.