Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thien anh » thien danh, thien thanh, thien chanh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
tien anh » tieng anh, tien manh, dien anh
cong san » cong tac
pham cau » phan cau, pham can, pha cau
pham ca » pham can, pham ma, pham va

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 ((thien anh) OR (tien anh)) - canh tranh cua nhung cong san ((pham cau) OR (pham ca))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien anh) or (tien anh)) - canh tranh cua nhung cong san ((pham cau) OR (pham ca))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien anh) or (tien anh)) - canh tranh cua nhung cong san ((pham cau) OR (pham ca))*.