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