Perhaps you should try some spelling variations:
"dung tran quoc slippers" » "dung tren quoc slippers", "hung tran quoc slippers", "dang tran quoc slippers", "dung trung quoc slippers", "dung han quoc slippers", "dung tran duc slippers", "dung tran quoc slippery", "dung tran quoc 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 tran quoc 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 tran quoc slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung tran quoc slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung tran quoc slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.