Perhaps you should try some spelling variations:
truong quan » trong quan, thong quan, luong quan
truong cua » truong ca, truong cao, huong cua
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
cong hach » cong sach, cong thanh, cong khanh
hach toan » thanh toan, manh toan
toan ban » van ban

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - thanh ((truong cua) OR (truong quan)) nhung cong hach toan ban~".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh ((truong cua) OR (truong quan)) nhung cong hach toan ban*.