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