Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nao nhi den snippets" » "nao noi den snippets", "nao nhiem den snippets", "nam nhin den snippets", "nao thai den snippets", "nao khi dien snippets", "nao nghi don 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: (((("nao nhi den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nao nhi den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nao nhi den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nao nhi den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.