Perhaps you should try some spelling variations:
"dung than phan slippers" » "dung thang phan slippers", "dung thanh phan slippers", "dung nhan phan slippers", "dung toan phan slippers", "dung thanh pham slippers", "dung than phan slippery", "dung than phan 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 than phan 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 than phan slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung than phan slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung than phan slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.