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