Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
dang cong » dung cong
cong cang » cong cong, cong lang, cong vang
thang cau » thong cau, thanh chau, nhung cau
ho chieu » hoc thieu, doi chieu, mot chieu
cua dang » cua cong, cua ban
hang cau » hang dau, hang ca, nhung cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) OR (theo chieu)) sach - hanh trinh cua dang cong cang ((thang cau) or (hang cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) sach - hanh trinh cua dang cong cang ((thang cau) OR (hang cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (theo chieu)) sach - hanh trinh cua dang cong cang ((thang cau) or (hang cau))".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (theo chieu)) sach - hanh trinh cua dang cong cang ((thang cau) or (hang cau))*.