Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan lan toc snippets" » "phan lap toc snippets", "phan van toc snippets", "phan loai toc snippets", "phan dan toc snippets", "phan luan tot snippets", "phan lan thom 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 lan 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: (((("phan lan toc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan lan toc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan lan toc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.