Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"phap tan tran slippers" » "phap tang tran slippers", "phap toan tran slippers", "phap than tran slippers", "phap tan tran slippery", "phap tan tran 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: (((("phap tan 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: (((("phap tan tran slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phap tan tran slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phap tan tran slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.