Perhaps you should try some spelling variations:
"dung vai trong slippers" » "dung tai trong slippers", "dung bai trong slippers", "dung dai trong slippers", "dung va trong slippers", "dung sai trong slippers", "dung vai trong slippery", "dung vai trong 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 vai trong 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 vai trong slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung vai trong slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung vai trong slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.