Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phap hoc voi snippets" » "phap hoan voi snippets", "phap mo voi snippets", "phap han voi snippets", "phap hoc vi snippets", "phap hoc vo snippets", "phap hoc noi snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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: (((("phap hoc voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phap hoc voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phap hoc voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phap hoc voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.