Perhaps you should try some spelling variations:
thanh khung » thanh hung, thanh chuong, thanh phuong
theo chieu » theo tieu, ho chieu, thi chieu
khung luan » chung luan, dung luan, hang luan
cong sang » cong san, cong lang, cong vang
theo chu » cho chu, chao chu, theo yeu
luan ung » luan hung, luon ung, luan chung
ung cong » dung cong, luong cong, duong cong
sang tao » hang tai
tao cao » bao cao, toan cao

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) OR (theo chu)) sach - thanh khung luan ung cong sang tao cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (theo chu)) sach - thanh khung luan ung cong sang tao cao".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (theo chu)) sach - thanh khung luan ung cong sang tao cao*.