Perhaps you should try some spelling variations:
"dung vinh tran slippers" » "dang vinh tran slippers", "dung ninh tran slippers", "quang vinh tran slippers", "dung minh trang slippers", "dung tinh trang slippers", "dung vinh thang slippers", "dung vinh tran slippery", "dung vinh tran 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 vinh tran 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 vinh tran slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung vinh tran slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung vinh tran slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.