Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
hanh trinh » canh tranh, hanh chinh
cong thanh » dong thanh, cong trinh, truong thanh
trinh cua » tinh cua, trinh luat, trinh quan
so thiet » soc thiet, hoc thiet, hoa thiet
cua bang » chua bang, cua ban, cua dang
cong tan » cong tac, cong san, cong ty
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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: so thiet tach - hanh trinh cua bang ((cong thanh) OR (cong tan)) ((toan cau) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: so thiet tach - hanh trinh cua bang ((cong thanh) or (cong tan)) ((toan cau) or (toan ban))*.