Perhaps you should try some spelling variations:
thien chanh » thien thanh, thien chinh, hien hanh
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
thien anh » thien danh, tien anh, thien thanh
trung va » truong va, trang va, trung ha
cong dan » cong san, cong tan, huong dan
than cao » toan cao, thai cao, than sao
than cap » khan cap, thanh lap, thanh cac

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 ((thien anh) OR (thien chanh)) - thanh trung va nhung cong dan ((than cao) OR (than cap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien anh) or (thien chanh)) - thanh trung va nhung cong dan ((than cao) OR (than cap))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien anh) or (thien chanh)) - thanh trung va nhung cong dan ((than cao) OR (than cap))*.