Perhaps you should try some spelling variations:
"dung doanh luc slippers" » "dung dan luc slippers", "dung dong luc slippers", "dung doanh luan slippers", "dung doanh cuoc slippers", "dung doanh duoc slippers", "dung doanh luc slippery", "dung doanh luc 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 doanh luc 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 doanh luc slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung doanh luc slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung doanh luc slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.