Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
dung chung » dung cong, dung ung, dung trung
hieu manh » chieu xanh, hieu nganh, dieu hanh
bang luan » tang luan, hang luan, dung luan
hoc hieu » hoc thieu, hoc hien, doc hieu
anh bang » anh hoang, anh quang, tinh bang
phan cau » phan dau, phan tu, phan lap
phan cac » nhan cach, phan dau, phan lap

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 hieu manh - anh bang luan ((nhung cong) OR (dung chung)) van ((phan cau) OR (phan cac))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - anh bang luan ((nhung cong) or (dung chung)) van ((phan cau) OR (phan cac))~".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - anh bang luan ((nhung cong) or (dung chung)) van ((phan cau) OR (phan cac))*.