Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
dinh trung » sinh trung, dinh trong, kinh trung
hanh trang » thanh trung, canh tranh, hanh trinh
thanh tung » thanh cong
tung cong » dung cong, tong cong, truong cong
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - ((dinh trung) or (hanh trang)) thanh tung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - ((dinh trung) OR (hanh trang)) thanh tung cong tan toan cau*.