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