Perhaps you should try some spelling variations:
"cay dan toan snippets" » "cay dan code snippets", "cay van toan snippets", "cay dan than snippets", "cay manh toan snippets", "cac dan toan snippets", "ca dan toan snippets", "cay lanh 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 ("cay dan 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 ("cay dan toan snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( cay dan toan snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("cay dan toan snippets"))) or ("locating bug core snippets"))*.