Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khu toan chi snippets" » "khi toan chi snippets", "khu doan chi snippets", "ke toan chi snippets", "khu toan cao snippets", "khu tai chi snippets", "khu luan chi 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: (((("khu toan chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khu toan chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khu toan chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khu toan chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.