Perhaps you should try some spelling variations:
"nguyen cao code snippets" » "nguyen can code snippets", "nguyen cay code snippets", "nguyen bao code snippets", "nguyen cao cong snippets", "nguyen cao de snippets", "nguyen cfd code snippets", "nguyen cao code 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"

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