Perhaps you should try some spelling variations:
"dung khoa dat slippers" » "dung cho dat slippers", "dung hoa dat slippers", "dung khoa dang slippers", "dung khoan dau slippers", "dung khoa dat slippery", "dung khoa dat 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 khoa dat 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 khoa dat slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung khoa dat slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung khoa dat slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.