Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khuan doi he snippets" » "khuan noi he snippets", "quan doi he snippets", "khoa doi he snippets", "khuan do he snippets", "khuan doi de snippets", "khuan moi he 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: (((("khuan doi he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khuan doi he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khuan doi he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khuan doi he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.