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