Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
theo chieu » ho chieu, theo chu, thi chieu
thong cong » trong cong, tong cong, thong thong
hanh tang » hanh trang, anh tang, hanh mang
cua thong » cua thuong, cua khong, cua tong
cong tac » cong ty
tac toan » tap toan, tam toan, hach 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: ((theo chieu) OR (theo tieu)) sach - ((hanh tang) or (hanh trinh)) cua thong cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo tieu)) sach - ((hanh tang) OR (hanh trinh)) cua thong cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (theo tieu)) sach - ((hanh tang) or (hanh trinh)) cua thong cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (theo tieu)) sach - ((hanh tang) or (hanh trinh)) cua thong cong tac toan cau*.