Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi de toc snippets" » "khi de toc snippets", "khoa de toc snippets", "khoi he toc snippets", "khoi de hoc snippets", "khoi de ton snippets", "khoi de thuoc 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: (((("khoi de 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: (((("khoi de toc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi de toc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi de toc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.