Perhaps you should try some spelling variations:
tien thanh » tien thinh, tran thanh, den thanh
canh manh » lanh manh, canh tranh, cach mang
ngan tong » nhan tong, nganh cong, nganh nong
hoc tien » hoc tieng, hoc hien, hoc vien
manh cua » doanh cua, ban cua
cua ngan » cua ban, vu ngan, cua dan
tong dan » tuong dan, thong dan, trong dan
phan cau » phan cac, phan tu, phan lap
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 tien thanh - canh manh cua ngan tong dan ((phan cau) OR (phan dau))~.
• Adding a wildcard symbol may retrieve word variants: hoc tien thanh - canh manh cua ngan tong dan ((phan cau) or (phan dau))*.