Perhaps you should try some spelling variations:
"dung trung wei slippers" » "dung trong wei slippers", "quang trung wei slippers", "truong trung wei slippers", "dung trang web slippers", "dung trung dai slippers", "dung trung tri slippers", "dung trung wei slippery", "dung trung wei 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 trung wei 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 trung wei slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung trung wei slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung trung wei slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.