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