Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam le doan snippets" » "nam le dan snippets", "nam ly doanh snippets", "nam le hoang snippets", "nam lo doan snippets", "nam he doan snippets", "nam de 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: (((("nam le 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: (((("nam le doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam le doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam le doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.