Perhaps you should try some spelling variations:
integration theories » integration theorems, integrationstheorie 2, integration theory
von integration » von interaktion, can integration, 1.2 integration
china internet » china's internet, via internet, china integrated
report china » report city
support von » rapport von, support can, support vs

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: (( support von integration theories. ) OR ( report china internet (service. OR services.) ))~.
• Adding a wildcard symbol may retrieve word variants: (( support von integration theories. ) or ( report china internet (service. or services.) ))*.