Perhaps you should try some spelling variations:
"dung ninh anh slippers" » "dung vinh anh slippers", "quang ninh anh slippers", "dung dich anh slippers", "dung hinh anh slippers", "dung minh anh slippers", "dung ninh thanh slippers", "dung ninh anh slippery", "dung ninh anh 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 ninh anh 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 ninh anh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung ninh anh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung ninh anh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.