Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trinh » canh tranh, hanh chinh
mot chieu » doi chieu, ho chieu
doc hieu » toc thieu, hoc thieu, hoc hien
trinh va » trinh van, trinh vat, trinh ve
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: ((mot chieu) OR (doc hieu)) sach - hanh trinh va nhung cong tan ((toan cau) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (doc hieu)) sach - hanh trinh va nhung cong tan ((toan cau) or (toan ban))*.