Perhaps you should try some spelling variations:
"dung len zheng slippers" » "dung lei zheng slippers", "dung len nhung slippers", "dung li zheng slippers", "dung nen zheng slippers", "dung le zheng slippers", "dung luan zheng slippers", "dung len zheng slippery", "dung len zheng 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 len zheng 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 len zheng slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung len zheng slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung len zheng slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.