Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
thanh tran » thanh trang, thanh toan, thanh tra
cong ngang » cong nhan, cong quang, cong nong
tran tuan » tran xuan, tran quang, tran thanh
tuan hang » tuan hoang, tuan bang, tuan dang
cong lang » cong vang, cong luong, cong quang
tuan tap » toan tap, tuan tai, tuyen tap

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 ((thieu xanh) OR (chinh sach)) - thanh tran tuan hang ((cong ngang) OR (cong lang)) tuan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (chinh sach)) - thanh tran tuan hang ((cong ngang) OR (cong lang)) tuan tap~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chinh sach)) - thanh tran tuan hang ((cong ngang) OR (cong lang)) tuan tap*.