Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan dan toi snippets" » "phan dang toi snippets", "phan dau toi snippets", "nhan dan toi snippets", "phan dan toc snippets", "phan dan thi snippets", "phan van toi 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 dan toi 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 dan toi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan dan toi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan dan toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.