Perhaps you should try some spelling variations:
integration theories » integration theorems, integrationstheorie 2, integration theory
share integration » fare integration, care integration, scale integration
internet services » internet service
price internet » pre internet, service internet, freie internet
import share » export share, export shares
import price » import prices, export price, export prices

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: (( import share integration theories. ) OR ( import price internet services. ))~.
• Adding a wildcard symbol may retrieve word variants: (( import share integration theories. ) or ( import price internet services. ))*.