Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach duoc da snippets" » "sach nuoc da snippets", "sach dao da snippets", "sach dung da snippets", "sach duoc dai snippets", "sach duoc dan snippets", "sach duoc dao 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 duoc da 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 duoc da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach duoc da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach duoc da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.