Perhaps you should try some spelling variations:
trong doanh » trong nganh
doanh tuan » doanh luan, doan tuan, doanh quan
trung cua » truong cua, trung tuan, trung cap
ho chieu » theo chieu, hoc thieu, doi chieu
manh cua » doanh cua, ban cua
tuan cau » toan cau, quan cau, tuan cu
ho hieu » hoi hieu, nho hieu, co hieu

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: ((ho hieu) OR (ho chieu)) quan - hanh ((manh cua) OR (trung cua)) dung trong doanh tuan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho hieu) OR (ho chieu)) quan - hanh ((manh cua) or (trung cua)) dung trong doanh tuan cau~".
• Adding a wildcard symbol may retrieve word variants: ((ho hieu) OR (ho chieu)) quan - hanh ((manh cua) or (trung cua)) dung trong doanh tuan cau*.