Perhaps you should try some spelling variations:
"programming languages classification methods." » "programming language versification methods.", "programming algae classification methods.", "programming guinea classification methods.", "program language classification methods."
"programsa language classical methods." » "program language classical methods.", "programsa language classical period.", "programsa language classical myth."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("programming languages classification methods.") or ("programsa language classical methods."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("programming languages classification methods.") OR ("programsa language classical methods."))*.
• Removing quotes may allow a broader search: (( programming languages classification methods. ) or ( programsa language classical methods. ))*.