Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
khong cang » thong cong, hong bang, khong dung
tuong cua » truong cua, huong cua, thong cua
cua khong » hua khong, cua phuong, cua thuong
thanh lap » thanh san, phan lap, thanh hai
cang tan » cong tan, cung tan, tang tan
than cap » khan cap, thanh cac, than cua

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 - thanh tuong cua khong cang tan ((than cap) or (thanh lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh tuong cua khong cang tan ((than cap) OR (thanh lap)).
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh tuong cua khong cang tan ((than cap) or (thanh lap))*.