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