Perhaps you should try some spelling variations:
dung phuong » dung thuong, bang phuong, dung chung
phuong dinh » phuong binh, phuong linh, phuong trinh
hieu lang » chieu sang, hieu quang, nhieu tang
manh tung » manh hung, thanh tung
dinh than » dinh thanh, dinh thang, dinh thuan
tung cua » trung cua, tuong cua, dung cua
cua dung » cua dang, cua dong, qua dung
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu lang) or (chinh sach)) - manh tung cua dung phuong dinh than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu lang) OR (chinh sach)) - manh tung cua dung phuong dinh than cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu lang) or (chinh sach)) - manh tung cua dung phuong dinh than cau*.