Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, dieu hanh
hieu lang » chieu sang, hieu quang, nhieu tang
cang luan » tang luan, hang luan, cong luan
tong luan » tang luan, dung luan, hang luan
dong cong » duong cong, dung cong, dang cong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
toan cao » toan ban, toan tap

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 manh) or (hieu lang)) - phan ((cang luan) or (tong luan)) dong cong manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu manh) OR (hieu lang)) - phan ((cang luan) OR (tong luan)) dong cong manh toan cao.
• Adding a wildcard symbol may retrieve word variants: doi ((hieu manh) or (hieu lang)) - phan ((cang luan) or (tong luan)) dong cong manh toan cao*.