Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cong co zhang slippers" » "cong co chang slippers", "cong tao zhang slippers", "cong hao zhang slippers", "dong co zhang slippers", "cong cu zhang slippers", "cong so zhang slippers", "cong co zhang slippery", "cong co zhang 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: (((("dung java java snippets") or ("cong co 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 co zhang slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( cong co zhang slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("cong co zhang slippers"))) or ("locating bug code snippets"))*.