Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
chiet tach » chieu sach
hanh doanh » hang doanh, chinh doanh, doanh doanh
doanh cua » doanh luan
bang cong » dang cong, bang song, hang cong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
cua bang » chua bang, cua ban, cua dang
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: hoc ((chiet tach) or (thien thanh)) - hanh doanh cua bang cong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chiet tach) OR (thien thanh)) - hanh doanh cua bang cong manh toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chiet tach) or (thien thanh)) - hanh doanh cua bang cong manh toan cau*.