Perhaps you should try some spelling variations:
thien thanh » tien thanh, hien hanh, chien tranh
nhung cong » dung cong, thong cong, hang cong
toan tuan » tran tuan, toan quan, toan luan
doan tuan » doan quan, doanh luan, doan quang
cong danh » cuong danh, cong dan, cong thanh
danh toan » manh toan, anh toan, dan toan
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien thanh) OR (thi thanh)) - thanh ((toan tuan) or (doan tuan)) nhung cong danh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (thi thanh)) - thanh ((toan tuan) OR (doan tuan)) nhung cong danh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien thanh) OR (thi thanh)) - thanh ((toan tuan) or (doan tuan)) nhung cong danh toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien thanh) OR (thi thanh)) - thanh ((toan tuan) or (doan tuan)) nhung cong danh toan cau*.