Perhaps you should try some spelling variations:
"nom toan trac snippets" » "nom toan tran snippets", "nom thoan tran snippets", "nom toan tap snippets", "ngoc toan trac snippets", "nin toan trac snippets", "nom tay trac snippets", "nom toan trac slippers"
"python using a snippets" » "python using a slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("nom toan trac snippets") or ("python using a snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nom toan trac snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nom toan trac snippets ) or ( python using a snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nom toan trac snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.