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, bang luan
cong luan » tong luan, cong tuan, dong 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 (cong luan)) dong cong manh toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((hieu manh) OR (hieu lang)) - phan ((cang luan) OR (cong luan)) dong cong manh toan cao".
• Adding a wildcard symbol may retrieve word variants: doi ((hieu manh) OR (hieu lang)) - phan ((cang luan) OR (cong luan)) dong cong manh toan cao*.