Perhaps you should try some spelling variations:
"dung vinh dan slippers" » "dang vinh dan slippers", "dung ninh dan slippers", "quang vinh dan slippers", "dung binh dan slippers", "dung vinh van slippers", "dung hinh dan slippers", "dung vinh dan slippery", "dung vinh dan grippers"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "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 vinh dan slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung vinh dan slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung vinh dan slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung vinh dan slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.