Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam ha doan snippets" » "nam chan doan snippets", "nam hoa doanh snippets", "nam thai doan snippets", "nam a doan snippets", "nam va doan snippets", "nam da 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 ha 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 ha doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam ha doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam ha doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.