Perhaps you should try some spelling variations:
tuong cong » truong cong, trong cong, tong cong
trinh vin » trinh van, trinh tin, trinh ven
theo chu » theo chieu, cho chu, chao chu
chu tinh » chau tinh, chua tinh, cuu tinh
trinh vi » trinh va, trinh ve, trinh viet
cong tan » cong tac, cong san, cong thanh
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: theo chu tinh - hanh ((trinh vi) OR (trinh vin)) tuong cong tan ((toan cau) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: theo chu tinh - hanh ((trinh vi) or (trinh vin)) tuong cong tan ((toan cau) or (toan ban))*.