Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
kinh sach » sinh sach, dinh sach, tinh sach
trinh cua » tinh cua, trinh luat, trinh quan
cong cong » cong dong, trong cong, dung cong
hoc kinh » hoc sinh, luoc kinh
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, ran cau, tra cau
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: hoc kinh sach - hanh trinh cua cong cong tan ((tran cau) OR (toan cau))~.
• Adding a wildcard symbol may retrieve word variants: hoc kinh sach - hanh trinh cua cong cong tan ((tran cau) or (toan cau))*.