Perhaps you should try some spelling variations:
"tran nhan dan slippers" » "tran nhat dan slippers", "tan nhan dan slippers", "tran han dan slippers", "tran phan dau slippers", "tran gian dan slippers", "tran nhan tai slippers", "tran nhan dan slippery", "tran nhan dan 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: (((("tran nhan dan slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran nhan dan slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran nhan dan slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran nhan dan slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.