Perhaps you should try some spelling variations:
phuong tinh » phuong trinh, phuong binh, khuong tinh
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hanh trung » thanh trung, hanh trang, manh trung
chu phuong » cuu phuong, thu phuong, cau phuong
trung cua » truong cua, trung tuan, trung cap
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
cua chu » sua chua

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 - hanh trung cua chu phuong tinh ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh trung cua chu phuong tinh ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh trung cua chu phuong tinh ((toan cau) or (toan ban))*.