Perhaps you should try some spelling variations:
trung thanh » truong thanh
chieu xanh » chieu sach, chieu sang, chieu tinh
tran thanh » ban thanh, van thanh, quan thanh
hoc chieu » hoc thieu, ho chieu, hoc hien
tran tuan » tran xuan, tran quang, tranh luan
dung cong » dung trong
cong tac » cong ty
tac ran » tac can, tac van, tac quan
ran cau » van cau, ban cau, can cau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - thanh ((((tran tuan) OR (tran thanh))) OR (trung thanh)) dung cong tac ran cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - thanh ((((tran tuan) OR (tran thanh))) or (trung thanh)) dung cong tac ran cau~".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - thanh ((((tran tuan) OR (tran thanh))) or (trung thanh)) dung cong tac ran cau*.