Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam su cao snippets" » "nam suu cao snippets", "nam sau cao snippets", "nam so cao snippets", "nam cu cao snippets", "nam vu cao snippets", "nam su co 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 su 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 su cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam su cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam su cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.