Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach hoi cho snippets" » "sach doi cho snippets", "sach moi cho snippets", "cach thoi cho snippets", "sach hoi chu snippets", "sach hoi co snippets", "sach hoc cho 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: (((("sach hoi cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sach hoi cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach hoi cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach hoi cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.