Perhaps you should try some spelling variations:
integration theories » integration theorems, integrationstheorie 2, integration theory
can integration » chain integration, von integration, urban integration
fund training » fused training, hand training, field training
und training » hand training, dnn training, led training
import can » import ban, import bans, import bank

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( import can integration theories. ) or ( export ((fund training) OR (und training)) services. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( import can integration theories. ) OR ( export ((fund training) OR (und training)) services. ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( import can integration theories. ) or ( export ((fund training) OR (und training)) services. ))*".