Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan viet chi snippets" » "danh viet chi snippets", "san viet chi snippets", "dao viet chi snippets", "dan viet cho snippets", "dan viec chi snippets", "dan viet chu 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 viet chi 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 viet chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan viet chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan viet chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.