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