Perhaps you should try some spelling variations:
"python using real snippets" » "python using metal snippets", "python using raw snippets", "python using real slippers"
"dan cao code snippets" » "dan cao cong snippets", "dan cao de snippets", "dan cfd code snippets", "dan ca code snippets", "dam cao code snippets", "dan bao code snippets", "dan cao code slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

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

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