Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vien cac toc snippets" » "vien bach toc snippets", "vien dai toc snippets", "vien da toc snippets", "vien cac toi snippets", "vien cac nuoc snippets", "vien cac thoi 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: (((("vien cac 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: (((("vien cac toc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vien cac toc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vien cac toc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.