Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cong dan zhang slippers" » "cong yan zhang slippers", "cong lidan zhang slippers", "cong danh thang slippers", "cong san zhang slippers", "cong tan zhang slippers", "huong dan zhang slippers", "cong dan zhang slippery", "cong dan zhang grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung java java snippets") or ("cong dan zhang slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("cong dan zhang slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( cong dan zhang slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("cong dan zhang slippers"))) or ("locating bug code snippets"))*.