Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan giai di snippets" » "luan giai di snippets", "phan loai di snippets", "dan giai di snippets", "phan giai bai snippets", "phan giai dap snippets", "phan giai tai 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: (((("phan giai di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan giai di snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan giai di snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan giai di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.