Perhaps you should try some spelling variations:
"dung vat trong slippers" » "dung viet trong slippers", "dung cay trong slippers", "dung dot trong slippers", "dung va trong slippers", "dong vat trong slippers", "dung dat trong slippers", "dung vat trong slippery", "dung vat 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 vat 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 vat trong slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung vat trong slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung vat trong slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.