Perhaps you should try some spelling variations:
"xua cua toan snippets" » "xua cua code snippets", "xua cuu toan snippets", "xua xuan toan snippets", "xua cua thanh snippets", "xuat cua toan snippets", "qua cua toan snippets", "lua cua toan snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data 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: (((("python using java snippets") or ("xua cua toan snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("xua cua toan snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( xua cua toan snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("xua cua toan snippets"))) or ("locating bug core snippets"))*.