Perhaps you should try some spelling variations:
"python using raw snippets" » "python using real snippets", "python using a snippets", "python using low snippets"
"nam tan doan snippets" » "nam tran doan snippets", "nam tap doan snippets", "nam van doan snippets", "nam dan doan snippets", "nam tai doan snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nam tan doan snippets") OR ("python using raw snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( nam tan doan snippets ) or ( python using raw snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("nam tan doan snippets") or ("python using raw snippets"))) or ("locating bug code snippets"))*.