Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam co cao snippets" » "nam cao cao snippets", "nam bo cao snippets", "nam so cao snippets", "nam cho cao snippets", "nam cu cao snippets", "nam co cau 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: (((("nam co cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nam co cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam co cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam co cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.