Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam manh hon snippets" » "nam danh hon snippets", "nam thanh hon snippets", "nam nganh hon snippets", "nam manh ho snippets", "nam minh hon snippets", "nam manh huong 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 manh hon 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 manh hon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam manh hon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam manh hon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.