Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam phan le snippets" » "dam phan le snippets", "nam thanh le snippets", "nam thang le snippets", "nam pham le snippets", "nam phan mem snippets", "nam phan lap 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 phan le 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 phan le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam phan le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam phan le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.