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