Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"moi nhat con snippets" » "moi bat con snippets", "hoi nhap con snippets", "moi nhan con snippets", "moi nhat co snippets", "moi nhap cong 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: (((("moi nhat con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("moi nhat con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( moi nhat con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("moi nhat con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.