Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"toc cong den snippets" » "hoc cong den snippets", "truoc cong den snippets", "thuoc cong den snippets", "toc cuong den snippets", "toc cong dan snippets", "toc cong de 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: (((("toc cong den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("toc cong den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toc cong den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toc cong den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.