Perhaps you should try some spelling variations:
trong doanh » trong nganh
hieu quan » hieu qua, lieu quan, thien quan
tranh cua » doanh cua, manh cua
trung cua » truong cua, trung tuan, trung cap
tuan cau » toan cau, tuan cu, thuan cam
quan cau » quang cao, toan cau, quan ha
ho hieu » ho chieu, hoi hieu, nho 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 quan - hanh ((tranh cua) OR (trung cua)) dung trong doanh ((tuan cau) OR (quan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu quan - hanh ((tranh cua) or (trung cua)) dung trong doanh ((tuan cau) OR (quan cau))~".
• Adding a wildcard symbol may retrieve word variants: ho hieu quan - hanh ((tranh cua) or (trung cua)) dung trong doanh ((tuan cau) OR (quan cau))*.