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