Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dung san ton snippets" » "dong san ton snippets", "dung sai ton snippets", "dung luan ton snippets", "dung san ten snippets", "dung han tong snippets", "dung van toan 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 san ton 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 san ton snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung san ton snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung san ton snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.