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