Perhaps you should try some spelling variations:
trung thanh » truong thanh
trung tuan » trung tam, truong thanh
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
tran tuan » tran xuan, tran quang, tran thanh
cong tan » cong tac, cong san, cong thanh
tran tap » toan tap, tran tan, trang tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - thanh ((trung tuan) OR (trung thanh)) nhung cong tan ((tran tap) or (tran tuan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - thanh ((trung tuan) OR (trung thanh)) nhung cong tan ((tran tap) OR (tran tuan))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - thanh ((trung tuan) OR (trung thanh)) nhung cong tan ((tran tap) or (tran tuan))*".