Perhaps you should try some spelling variations:
"import trade integration theories." » "import trade integration theorems.", "import trade integrationstheorie 2.", "import trade integration theory.", "export trade integration theories.", "import price integration theories.", "import taxes integration theories."
"support land banking series." » "support land banking services.", "support land making series.", "support land banking service.", "support plans banking series.", "support long banking series.", "support add banking series.", "support banks banking series.", "support land bank series.", "support land banks series."

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("import trade integration theories.") or ("support land banking series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("import trade integration theories.") OR ("support land banking series.")).
• Removing quotes may allow a broader search: (( import trade integration theories. ) or ( support land banking series. )).
• Adding a wildcard symbol may retrieve word variants: (("import trade integration theories.") or ("support land banking series."))*.