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