Perhaps you should try some spelling variations:
integration theory » integration through, information theory, innovation theory
crowd integration » grid integration, rfid integration, beyond integration
load training » wood training, load pricing, does training
supply crowd » supply growth, supply cost, supply from
led training » und training, based training, embed training

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: (( supply crowd integration theory. ) OR ( export ((load training) OR (led training)) services. ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( supply crowd integration theory. ) or ( export ((load training) OR (led training)) services. ))~".
• Adding a wildcard symbol may retrieve word variants: (( supply crowd integration theory. ) or ( export ((load training) OR (led training)) services. ))*.