Perhaps you should try some spelling variations:
tien thanh » tien thinh, den thanh
tran thanh » ban thanh, van thanh, quan thanh
nhung cong » dung cong, thong cong, hang cong
trinh han » trinh quan
trinh thi » trinh tai, dinh thi, trinh tu
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan 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: doan ((tien thanh) OR (tran thanh)) - hanh ((trinh han) OR (trinh thi)) nhung cong dan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doan ((tien thanh) OR (tran thanh)) - hanh ((trinh han) or (trinh thi)) nhung cong dan toan cau~".
• Adding a wildcard symbol may retrieve word variants: doan ((tien thanh) OR (tran thanh)) - hanh ((trinh han) or (trinh thi)) nhung cong dan toan cau*.