Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa can toc snippets" » "khoa cam toc snippets", "khoa cap toc snippets", "khoi can toc snippets", "khoa dan toc snippets", "khoa cac toc snippets", "khoa cao toc 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 can toc 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 can toc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa can toc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa can toc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.