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