Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
theo chu » theo chieu, cho chu, chao chu
tang van » dang van, hoang van, trong van
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap
tang va » trang va, thang va, tang vat

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chu) OR (theo tieu)) sach - hanh ((tang va) OR (tang van)) nhung cong tan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chu) or (theo tieu)) sach - hanh ((tang va) OR (tang van)) nhung cong tan toan cau~".
• Adding a wildcard symbol may retrieve word variants: ((theo chu) or (theo tieu)) sach - hanh ((tang va) OR (tang van)) nhung cong tan toan cau*.