Perhaps you should try some spelling variations:
mach phan » cach pha, dich phan, sach phat
phan dong » phan cong, phan dang, phan hong
doanh co » doanh cua, doanh va, anh co
su mach » su sach
dong ha » dong hoa, dong va, dong hoc
su tam » suu tam, su nam, su lam
su tai » su thi, tu tai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((su tam) OR (su tai)) doanh co khi đong luc ) or ( su mach phan dong ha đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((su tam) OR (su tai)) doanh co khi đong luc ) OR ( su mach phan dong ha đong luc ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((su tam) OR (su tai)) doanh co khi đong luc ) or ( su mach phan dong ha đong luc ))*".