Perhaps you should try some spelling variations:
"dung hao zhang slippers" » "dung tao zhang slippers", "dung xiao zhang slippers", "dung bao thang slippers", "dung ha zhang slippers", "dung hai zhang slippers", "dung bao zhang slippers", "dung hao zhang slippery", "dung hao zhang 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: (((("dung hao zhang slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung hao zhang slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung hao zhang slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung hao zhang slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.