Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa dan voi snippets" » "khoa dang voi snippets", "hoa dan voi snippets", "khoa can voi snippets", "khoa dan hoi snippets", "khoa ban voi snippets", "khoa da 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 dan 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 dan voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa dan voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa dan voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.