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