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