Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phuong hoang
hien thanh » thien thanh, hien hanh, tien thanh
phung cong » nhung cong, phong cong, nhung chong
canh manh » lanh manh, canh tranh, cach mang
manh cua » doanh cua, ban cua
tan van » tran van, tang van, luan van

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien thanh - canh manh cua ((phuong cong) OR (phung cong)) tan van ban~".
• Adding a wildcard symbol may retrieve word variants: hoc hien thanh - canh manh cua ((phuong cong) OR (phung cong)) tan van ban*.