Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"yu zhang jun snippets" » "yu zhang jian snippets", "yu liang jun snippets", "yu wang jun snippets", "you zhang jun snippets", "yu hang jun snippets", "yuan zhang jun snippets", "yu zhang jun 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: (((("yu zhang jun snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("yu zhang jun snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( yu zhang jun snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("yu zhang jun snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.