Perhaps you should try some spelling variations:
chuong trinh » cong trinh
khuong tinh » phuong trinh, phuong binh, khun tinh
hanh trung » thanh trung, hanh trang, manh trung
theo chieu » theo tieu, ho chieu, thi chieu
trung cua » truong cua, trung tuan, trung cap
theo chu » cho chu, chao chu, theo yeu
toan cau » toan cao, toan ban, toan tap
cua chu » sua chua

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 (theo chu)) sang - hanh trung cua chu ((khuong tinh) OR (chuong trinh)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (theo chu)) sang - hanh trung cua chu ((khuong tinh) or (chuong trinh)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (theo chu)) sang - hanh trung cua chu ((khuong tinh) or (chuong trinh)) toan cau*.