Perhaps you should try some spelling variations:
"export price integration theories." » "export price integration theorems.", "export price integrationstheorie 2.", "export price integration theory.", "export service integration theories.", "export trade integration theories.", "export price indexation theories.", "export prices integration theories.", "import prices integration theories."
"support agri irrigation schemes." » "support agri irrigation scheme.", "support agri irrigation systems.", "support africa irrigation schemes.", "support grain irrigation schemes.", "support syria irrigation schemes.", "support grid irrigation schemes.", "support aging irrigation schemes.", "support a irrigation schemes."

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

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