Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dam van cao snippets" » "dao van cao snippets", "nam van cao snippets", "pham van cao snippets", "dam van dao snippets", "dam van bao snippets", "dam van cau 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: (((("dam van 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: (((("dam van cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dam van cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dam van cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.