Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"vung tay chat snippets" » "vung tau chat snippets", "dung tai chat snippets", "vung dat chat snippets", "vung tao chat snippets", "vung ta chat snippets", "vung cao chat 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: (((("dung java java snippets") or ("vung tay chat snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("vung tay chat snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( vung tay chat snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("vung tay chat snippets"))) or ("locating bug code snippets"))*.