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