Perhaps you should try some spelling variations:
"cong danh hieu snippets" » "cuong danh hieu snippets", "cong dan hieu snippets", "cong thanh hieu snippets", "cong doanh hieu snippets", "cong manh hieu snippets", "cong dinh hieu snippets", "cong danh hieu 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 danh hieu 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 danh hieu snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong danh hieu snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong danh hieu snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.