Perhaps you should try some spelling variations:
"dung khang than slippers" » "dung thang than slippers", "quang khang than slippers", "dung nhan than slippers", "dung khang chan slippers", "dung khan than slippers", "dung khang khuan slippers", "dung khang than slippery", "dung khang than 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 java java snippets") or ("dung khang than slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dung khang than slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dung khang than slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dung khang than slippers"))) or ("locating bug code snippets"))*.