Perhaps you should try some spelling variations:
trinh toan » tinh toan, thanh toan, trinh quan
hieu lang » chieu sang, hieu quang, nhieu tang
hanh manh » hanh mang, lanh manh, hoang manh
hang cong » dang cong, hang nong, bang cong
trinh han » trinh quan
hoi hieu » hoi phieu, hoi tieu, moi hieu
manh cua » doanh cua, ban cua
cua hang » cua dang, cua nhung, cua cong

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: hoi hieu lang - hanh manh cua hang cong ((trinh toan) OR (trinh han)) dau~.
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - hanh manh cua hang cong ((trinh toan) or (trinh han)) dau*.