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