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