Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam sach mo snippets" » "ngan sach mo snippets", "nam danh mo snippets", "nam sao mo snippets", "nam sach moi snippets", "nam sach lo snippets", "nam sach dao 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 sach mo 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 sach mo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam sach mo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam sach mo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.