Perhaps you should try some spelling variations:
"dung thue nhap slippers" » "dung thu nhap slippers", "dung thuoc nhap slippers", "dung thiet nhap slippers", "dung tue nhan slippers", "dung thu nhat slippers", "dung thue nhap slippery", "dung thue nhap 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 thue nhap 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 thue nhap slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung thue nhap slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung thue nhap slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.