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