Perhaps you should try some spelling variations:
"toc tan doan snippets" » "toc tan code snippets", "toc tran doan snippets", "toc tap doan snippets", "toc van doan snippets", "toc tay doan snippets", "toc ta doan snippets", "toc san doan snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("python using java snippets") or ("toc tan doan snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("toc tan doan snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( toc tan doan snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("toc tan doan snippets"))) or ("locating bug core snippets"))*.