How to solve the error "Oops! That page can’t be found" when access Portfolio

My website is being on https://ahamedia.vn.
It shows the error "Oops! That page can’t be found" when access any Portfolio item at this links: https://ahamedia.vn/hau-truong/

Describe:
I use 2 plugins about Portfolio:

• 1 portfolio is available when installing WP;
• 1 piece using Visual Portfolio plugin.
  Objects using Visual Portfolio are normally displayed

Please suggest a solution to this error!
Thanks