Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach ve cho snippets" » "sach va cho snippets", "sach de cho snippets", "sach viet cho snippets", "sach ve co snippets", "sach ve che 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 ve 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 ve cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach ve cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach ve cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.