Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham luan ao snippets" » "phap luan ao snippets", "pham quang ao snippets", "pham van ao snippets", "pham luan bao snippets", "pham quan ao snippets", "pham luan khao 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: (((("pham luan ao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pham luan ao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham luan ao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham luan ao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.