Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
nhung tung » nhung tuong, nhung dung, nhung vung
canh manh » lanh manh, canh tranh, cach mang
cua nhung » va nhung
manh cua » doanh cua, ban cua
tung dan » dung dan, huong dan, trung dai
chan cau » can cau, chinh cau, nhanh cau
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: theo chieu sach - canh manh cua nhung tung dan ((chan cau) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - canh manh cua nhung tung dan ((chan cau) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - canh manh cua nhung tung dan ((chan cau) or (phan cau))*.