Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"_ dan toan snippets" » "_ van toan snippets", "_ dan than snippets", "_ manh toan snippets", "_ dau toan snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("_ dan toan snippets"))) OR ("locating bug code snippets"))~.
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( _ dan toan snippets ))) or ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("_ dan toan snippets"))) or ("locating bug code snippets"))*.