Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam khoi de snippets" » "nam khoa de snippets", "nam hoi de snippets", "nam kho de snippets", "nam khi de snippets", "nam khoi he 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: (((("nam khoi de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nam khoi de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam khoi de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam khoi de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.