Perhaps you should try some spelling variations:
trong doanh » trong nganh
thien quan » trien quang, lien quan, thien van
doanh tuan » doanh luan, doan tuan, doanh quan
hieu quan » hieu qua, lieu quan, lien quan
tranh cua » doanh cua, manh cua
trung cua » truong cua, trung tuan, trung cap
tuan cau » toan cau, quan cau, tuan cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu quan) OR (thien quan)) - hanh ((tranh cua) or (trung cua)) dung trong doanh tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quan) OR (thien quan)) - hanh ((tranh cua) OR (trung cua)) dung trong doanh tuan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu quan) OR (thien quan)) - hanh ((tranh cua) or (trung cua)) dung trong doanh tuan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quan) OR (thien quan)) - hanh ((tranh cua) or (trung cua)) dung trong doanh tuan cau*.