Perhaps you should try some spelling variations:
"jun ying zhang snippets" » "jun ming zhang snippets", "jun qing zhang snippets", "jun yang zhang snippets", "jun yin zhang snippets", "jun yong zhang snippets", "dan ying zhang snippets", "jun ying 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 java java snippets") or ("jun ying zhang snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("jun ying zhang snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( jun ying zhang snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("jun ying zhang snippets"))) or ("locating bug code snippets"))*.