Perhaps you should try some spelling variations:
hostile environment » hostile environments, mobile environment, hospital environment
coastal environment » coastal environments
digital environment » virtual environment, coastal environments
total environment » global environment, coastal environments, virtual 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 (total environment))) OR (digital environment)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hostile environment) or (((((coastal environment) OR (total environment))) or (digital environment))))".
• Adding a wildcard symbol may retrieve word variants: ((hostile environment) or (((((coastal environment) OR (total environment))) or (digital environment))))*.