tím lỗi sai ạ  I think that you had difficulty to find his house.

Note: Sử dụng find thường hơn trong trường hợp này, chứ không phải have difficulty to find.

Explanation: Tính từ khó khăn cần được đi kèm với động từ nguyên mẫu (finding), không sử dụng 'to' sau cụm từ khó khăn.

Corrected sentence: I think that you had difficulty finding his house.

Wrong: his house. Đúng: his house.

Wrong: had difficulty to. Đúng: had difficulty finding.