Perhaps you should try some spelling variations:
"import data integration theories." » "import data integration theorems.", "import data integrationstheorie 2.", "import data integration theory.", "import data integrity theories.", "import duty integration theories."
"support statt integration social." » "support statt international social.", "support smt integration social.", "support statt entegrasyon social.", "support test integration social.", "support start integration social.", "support state integration social.", "support staff integration social."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("support statt integration social.") or ("import data integration theories."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support statt integration social.") OR ("import data integration theories."))*.
• Removing quotes may allow a broader search: (( support statt integration social. ) or ( import data integration theories. ))*.