Perhaps you should try some spelling variations:
"dong wang zhang snippets" » "dong yang zhang snippets", "dong wang zhong snippets", "dong xiang zhang snippets", "dong bang zhang snippets", "cong wang zhang snippets", "dong nang zhang snippets", "dong wang zhang slippers"
"dung va java snippets" » "dung java java snippets", "dung va 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 va java snippets") or ("dong wang zhang snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung va java snippets") OR ("dong wang zhang snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung va java snippets ) or ( dong wang zhang snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung va java snippets") or ("dong wang zhang snippets"))) or ("locating bug code snippets"))*.