Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
trinh vat » trinh van, trinh luat, sinh vat
vat thong » va thong, vat trong, mat thong
thuat cao » thuat co, thuat bao, thuat cam
ho chieu » hoc thieu, doi chieu, mot chieu
cong ban » cong bang, cong san, cong tan
thai cao » tai cao, thoai cac, toan cao

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 chieu) OR (ho chieu)) sach - hanh trinh vat thong cong ban ((thai cao) OR (thuat cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (ho chieu)) sach - hanh trinh vat thong cong ban ((thai cao) OR (thuat cao))~".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (ho chieu)) sach - hanh trinh vat thong cong ban ((thai cao) OR (thuat cao))*.