Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam tan cao snippets" » "nam dan cao snippets", "nam tai cao snippets", "nam van cao snippets", "nam toan cao snippets", "nam tao cao snippets", "nam tay 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: (((("nam tan 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 tan cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam tan cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam tan cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.