Perhaps you should try some spelling variations:
crowd information » road information, crop information, card information
irrigation system » irrigation systems, irrigation water, irrigation scheme
syria irrigation » africa irrigation, drip irrigation, surge irrigation
supply crowd » supply growth, supply cost, supply from
supply syria » supply africa, supply social, supply sierra

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 information theory. ) or ( supply syria irrigation system. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply crowd information theory. ) OR ( supply syria irrigation system. )).
• Adding a wildcard symbol may retrieve word variants: (( supply crowd information theory. ) or ( supply syria irrigation system. ))*.