Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa luat du snippets" » "khoa luan du snippets", "hoa xuat du snippets", "hoa luan du snippets", "khoa luat dau snippets", "khoa luat su snippets", "khoa luat tu 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 luat du 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 luat du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa luat du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa luat du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.