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