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