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