Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nghe co do snippets" » "nghe che do snippets", "nghe hoa do snippets", "nghe noi do snippets", "nghe co dot snippets", "nghe co don snippets", "nghe co so 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: (((("nghe co do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nghe co do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nghe co do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nghe co do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.