Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"wei fang can snippets" » "wei tang can snippets", "wei wang can snippets", "wei yang can snippets", "wei nang can snippets", "wei fang yuan snippets", "wei nang cao 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 fang can 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 fang can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( wei fang can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("wei fang can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.