Perhaps you should try some spelling variations:
"dung viet nano snippets" » "nang viet nano snippets", "cong viet nano snippets", "mang viet nano snippets", "dung viet nang snippets", "dung viet nam snippets", "dung viet anh snippets", "dung viet nano slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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 viet nano 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 viet nano snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung viet nano snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung viet nano snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.