Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien xanh » hien hanh, hien nhanh, chieu xanh
tran dung » tran dang, tran quang, trung dung
tran hung » tran hong, tran quang, tran hoang
tran tuan » tran xuan, tran quang, tran thanh
cong tac » cong ty
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 ((tran dung) OR (tran hung)) cong tac ((tran tap) or (tran tuan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - thanh trung ((tran dung) OR (tran hung)) cong tac ((tran tap) OR (tran tuan))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - thanh trung ((tran dung) OR (tran hung)) cong tac ((tran tap) or (tran tuan))*".