he spoke slowly and emphatically order to make himself clear

=> Sai ở clear sửa thành: clearly
the plane didn't land yet so i will wait until it arrives

=> Sai ở didn't land sử thành: hasn't landed
paul doesn't speak much vietnamese , only a litte words

=> Sai ở a little sử thành: little
he lost his money while he walked to the supermaket

=> Sai ở walked sửa thành: was walking 
she was waiting nervous in the waiting room for the interview

=> Thêm từ: "with" vào giữa  từ waiting và nervous
one of the best ways to stay healthy are to do exercise every morning

=> Sai ở to do sửa thành: doing

#chuchoctot

Xin hay nhất ạ!!!

  clear ⇒ clearly
didn't land ⇒ hasn't landed
 a little ⇒ little
walked ⇒ was walking 
 Thêm từ: "with" vào giữa  từ waiting với nervous

 to do ⇒doing