Perhaps you should try some spelling variations:
"qing zhang a snippets" » "ming zhang a snippets", "yang zhang a snippets", "qing khang a snippets", "qing chang ha snippets", "qing thang ay snippets", "qing zhang a slippers"
"python using java snippets" » "python using data snippets", "python using java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("qing zhang a snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("qing zhang a snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( qing zhang a snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("qing zhang a snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.