Perhaps you should try some spelling variations:
"dung luu trong slippers" » "dung luat trong slippers", "dung tu trong slippers", "dung le trong slippers", "dung luan trong slippers", "dung cua trong slippers", "dung luu trong slippery", "dung luu 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 luu 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 luu trong slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung luu trong slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung luu trong slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.