Question

[Tuấn Nguyễn]

It was very difficult for me to find out the answer to this question.

→I had ....

Answer 1

[Bagel]

I had difficulty (in) finding out the answer to this question.

-have difficulty (in) Ving : Khó khăn trong việc làm gì

-Có "in" hay không vẫn được nha.

Answer 2

[𝙳𝚁𝚂_𝙷𝙴𝙻𝚃𝚁𝙸𝚇]

→I had a very difficult time finding out the answer to this question.