Perhaps you should try some spelling variations:
"python using code snippets" » "python using cfd snippets", "python using one snippets", "python using code slippers"
"pham tu dat snippets" » "phan tu dat snippets", "pham thi dat snippets", "pham tai dat snippets", "pham tu bat snippets", "pham tu 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: (((("pham tu 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: (((("pham tu dat snippets") OR ("python using code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham tu dat snippets ) or ( python using code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham tu dat snippets") or ("python using code snippets"))) or ("locating bug code snippets"))*.