Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan sach de snippets" » "ngan sach de snippets", "nhan cach de snippets", "nhan sinh de snippets", "nhan sach dao snippets", "nhan sach dat 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: (((("nhan sach de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhan sach de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan sach de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan sach de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.