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