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