Perhaps you should try some spelling variations:
"dung mat nhieu snippets" » "dung rat nhieu snippets", "dung dat hieu snippets", "dung bao nhieu snippets", "duong mat nhieu snippets", "dung dat nhieu snippets", "dung may nhieu snippets", "dung mat nhieu 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: (((("dung mat nhieu snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung mat nhieu snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung mat nhieu snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung mat nhieu snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.