Perhaps you should try some spelling variations:
"dung vuon toi snippets" » "dung von toi snippets", "dung muon toi snippets", "duong vuong toi snippets", "dung vuong thi snippets", "dung huong toi snippets", "dung vuot troi 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: (((("dung vuon toi snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung vuon toi snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung vuon toi snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung vuon toi snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.