Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach du chat snippets" » "sach dau chat snippets", "sach de chat snippets", "sach tu chat snippets", "sach duoc chat snippets", "sach dung chat snippets", "sach doc chat 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 du chat 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 du chat snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach du chat snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach du chat snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.