Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"zheng ni ca snippets" » "zheng ning ca snippets", "zheng liu ca snippets", "zheng xie ca snippets", "zheng li ca snippets", "zheng na ca snippets", "zheng ni cr snippets"
"locating bug code snippets" » "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: (((("zheng ni ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("zheng ni ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( zheng ni ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("zheng ni ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.