Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nan toan cao snippets" » "nin toan cao snippets", "van toan cao snippets", "dan toan cao snippets", "nan toan ban snippets", "nan toan tap snippets"
"locating bug code snippets" » "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: (((("nan toan cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nan toan cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nan toan cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nan toan cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.