Perhaps you should try some spelling variations:
tien thanh » tien thinh, tran thanh, den thanh
nhung cong » dung cong, thong cong, hang cong
doan tien » doan thien, doanh tien, toan tien
trinh hoa » trinh han
trinh he » trinh han, trinh thi, trinh ky
trinh do » trinh ky
cong san » cong tac
san toan » van toan, dan toan, 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 - hanh ((trinh he) OR (((trinh hoa) OR (trinh do)))) nhung cong san toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doan tien thanh - hanh ((trinh he) or (((trinh hoa) OR (trinh do)))) nhung cong san toan cau~".
• Adding a wildcard symbol may retrieve word variants: doan tien thanh - hanh ((trinh he) or (((trinh hoa) OR (trinh do)))) nhung cong san toan cau*.