Perhaps you should try some spelling variations:
"python using code snippets" » "python using cfd snippets", "python using one snippets", "python using code slippers"
"phan van dat snippets" » "pham van dat snippets", "thanh van dat snippets", "luan van dat snippets", "phan van dao snippets", "phan van dau snippets", "phan dan dat snippets", "phan van dat slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code 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: (((("phan van dat snippets") or ("python using code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan van dat snippets") OR ("python using code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan van dat snippets ) or ( python using code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan van dat snippets") or ("python using code snippets"))) or ("locating bug code snippets"))*.