Perhaps you should try some spelling variations:
"support pilots integration theories." » "support pilots integration theorems.", "support pilots integrationstheorie 2.", "support pilots integration theory.", "support pilot reintegration theories.", "support its integration theories.", "support options integration theories.", "support plans integration theories.", "support distorts integration theories.", "support patients integration theories."
"support chapter irrigation schemes." » "support water irrigation schemes.", "support change irrigation schemes.", "support chapter fabrication schemes.", "support chapter irrigation scheme.", "support chapter irrigation systems.", "report chapter irrigation schemes.", "short chapter 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 chapter irrigation schemes.") or ("support pilots integration theories."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support chapter irrigation schemes.") OR ("support pilots integration theories.")).
• Removing quotes may allow a broader search: (( support chapter irrigation schemes. ) or ( support pilots integration theories. )).
• Adding a wildcard symbol may retrieve word variants: (("support chapter irrigation schemes.") or ("support pilots integration theories."))*.