Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"wei pan he snippets" » "wei tan he snippets", "wei tang he snippets", "wei fang he snippets", "wei dan he snippets", "wei van he snippets", "wei pan zhen 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 pan he 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 pan he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( wei pan he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("wei pan he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.