Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa co hoi snippets" » "hoa co hoi snippets", "khoa cong hoi snippets", "khoa hoc hoi snippets", "khoa co hoc snippets", "khoa co loi 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 co hoi 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 co hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa co hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa co hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.