Perhaps you should try some spelling variations:
integration series » integration theories, integrating services, integration schemes
crowd integration » grid integration, trade integration, chain integration
supply crowd » supply growth, supply cost, supply how
road mapping » road marking, road markings, a mapping
road making » road marking, road markings, road paving

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( supply crowd integration series. ) or ( supply ((road making) OR (road mapping)) services. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply crowd integration series. ) OR ( supply ((road making) OR (road mapping)) services. ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( supply crowd integration series. ) or ( supply ((road making) OR (road mapping)) services. ))*".