Perhaps you should try some spelling variations:
trong doan » trong doanh, trong dan, trong hoan
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
doan phan » doanh phan, toan phan, dan phan
tung cua » trung cua, tuong cua, tang cua
dung cua » dung luan, dung cho
phan dau » phan tu, hang dau

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: hoc ((hien xanh) OR (hien hanh)) - thanh ((tung cua) OR (dung cua)) dung trong doan phan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) or (hien hanh)) - thanh ((tung cua) OR (dung cua)) dung trong doan phan dau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (hien hanh)) - thanh ((tung cua) OR (dung cua)) dung trong doan phan dau*.