Perhaps you should try some spelling variations:
theo chieu » ho chieu, theo chu, thi chieu
luan nhung » luan chung, luan hung, quan nhung
nhung cong » dung cong, thong cong, hang cong
trinh toan » tinh toan, thanh toan, trinh quan
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
trinh han » trinh quan

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 chieu) OR (theo tieu)) sang - hanh tang luan nhung cong ((trinh toan) OR (trinh han)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (theo tieu)) sang - hanh tang luan nhung cong ((trinh toan) OR (trinh han)) cau~".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo tieu)) sang - hanh tang luan nhung cong ((trinh toan) OR (trinh han)) cau*.