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