Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"day danh ke snippets" » "day manh ke snippets", "dai danh ke snippets", "dao danh ke snippets", "day dan ke snippets", "day danh kien snippets", "day doanh ket 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: (((("day danh ke snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("day danh ke snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( day danh ke snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("day danh ke snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.