Perhaps you should try some spelling variations:
theo chieu » ho chieu, theo chu, thi chieu
hanh thang » nhanh thang, thanh thang, hanh trang
thuong con » thuong dong, truong cong, thong cong
thang va » hang va, trang va, thong va
tac toan » tap toan, tam toan, hach toan
toan tap » toan ban
con tac » cong tac, con tap, can tac

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 tieu)) sach - hanh thang va thuong con tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo tieu)) sach - hanh thang va thuong con tac toan tap.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo tieu)) sach - hanh thang va thuong con tac toan tap*.