Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
hanh manh » hanh mang, lanh manh, hoang manh
dung cong » dung trong
cong nhan » cong nhat, cong thanh, cong san
nhan quan » nha quan, phan quan, nhan luan
manh cua » doanh cua, ban cua
cua dung » cua dang, cua dong, qua dung
quan cau » quang cao, toan cau, quan ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu lang) or (trieu tinh)) - hanh manh cua dung cong nhan quan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (trieu tinh)) - hanh manh cua dung cong nhan quan cau.
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (trieu tinh)) - hanh manh cua dung cong nhan quan cau*.