Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thien hach » thien thanh, hien hanh
hanh trinh » canh tranh, hanh chinh
cua thuong » cua truong, cua phuong, ca thuong
trinh cua » tinh cua, trinh luat, trinh quan
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
phan cau » phan dau, phan cac, phan tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thuat sach) or (thien hach)) - hanh trinh cua thuong ((cong dan) or (cong tan)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thuat sach) OR (thien hach)) - hanh trinh cua thuong ((cong dan) OR (cong tan)) phan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thuat sach) or (thien hach)) - hanh trinh cua thuong ((cong dan) or (cong tan)) phan cau*.