A: Excuse me. I have trouble finding the right direction. Can you help me?
A: 打扰一下。我找不到正确的方向。你能帮我吗?
B: Sure. Where do you need to go?
B: 当然可以。你要去哪里？
A: I have trouble finding the right direction. Am I going north?
A: 我找不到正确的方向了。我是在往北走吗?
B: No. This way is south. You took the wrong direction.
B：不是。这条路是向南的。你走错方向了。

重点讲解：

I can't find the right direction.
I have trouble finding the right direction.
将"我找不到正确的方向"这句话直译为I can't find the right direction.是没有语法错误的，不过如果将can't替代为短语have trouble doing sth.,则更能体现 出"有困难；需要他人帮助"的语境。