Perhaps you should try some spelling variations:
"dong yang zhang slippers" » "dong yan zhang slippers", "dong cang thang slippers", "dong lang thang slippers", "dong bang zhang slippers", "dong nang zhang slippers", "dong quang zhang slippers", "dong yang zhang slippery", "dong yang 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: (((("dong yang 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: (((("dong yang zhang slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong yang zhang slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong yang zhang slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.