Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa hoi voi snippets" » "khoan hoi voi snippets", "khoa hoc voi snippets", "khoa doi voi snippets", "khoa choi voi snippets", "khoa hop voi 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: (((("khoa hoi 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: (((("khoa hoi voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa hoi voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa hoi voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.