Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa cua he snippets" » "hoa cua he snippets", "kho cua he snippets", "khoe cua he snippets", "khoa cua che snippets", "khoa cua te snippets", "khoa cua le 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 cua 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: (((("khoa cua he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa cua he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa cua he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.