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