Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"geng chen do snippets" » "ben chen do snippets", "bing chen do snippets", "dong chen do snippets", "geng che do snippets", "geng chuyen do snippets", "geng chen den 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: (((("geng chen do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("geng chen do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( geng chen do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("geng chen do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.