Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nao hoi den snippets" » "nam hoi den snippets", "tao hoi den snippets", "nao noi den snippets", "nao hoi dien snippets", "nao hoi dan snippets", "nao moi den 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 hoi 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 hoi den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nao hoi den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nao hoi den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.