Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"wei tang chu snippets" » "wei tan chu snippets", "wei zhang chu snippets", "le tang chu snippets", "wei tang khu snippets", "wei tang cho snippets", "wei tang phu 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: (((("wei tang chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("wei tang chu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( wei tang chu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("wei tang chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.