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