Perhaps you should try some spelling variations:
nhung tong » nhung tuong, nhung cong, nhung bong
vien manh » tien manh, vien nganh, vien thanh
vien canh » bien canh, vien can, vien nganh
canh manh » lanh manh, canh tranh, cach mang
cua nhung » va nhung
manh cua » doanh cua, ban cua
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 ((vien manh) OR (vien canh)) - canh manh cua nhung tong dan ((phan cau) OR (phan dau))~.
• Adding a wildcard symbol may retrieve word variants: hoc ((vien manh) or (vien canh)) - canh manh cua nhung tong dan ((phan cau) or (phan dau))*.