Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach nang ca snippets" » "cach mang ca snippets", "sach dung ca snippets", "sach danh ca snippets", "sach nang cao snippets", "sach nang cap snippets", "sach nang cai 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 nang ca 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 nang ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach nang ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach nang ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.