Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa ke do snippets" » "khoan ke do snippets", "khoa he do snippets", "kha ke do snippets", "khoa ke o snippets", "khoa ke co snippets", "khoa ke mo 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 ke do 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 ke do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa ke do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa ke do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.