Perhaps you should try some spelling variations:
thanh trinh » hanh trinh, thanh tinh, thanh binh
thieu xanh » chieu xanh, hieu manh, thien anh
luong cong » dung cong, trong cong, cong cong
hieu lang » chieu sang, hieu quang, nhieu tang
trinh han » trinh quan
han luong » hang luong, phan luong, van luong
manh toan » thanh toan, anh tuan, tinh toan
dan toan » van toan, dan than, xuan toan

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 ((thieu xanh) OR (hieu lang)) - thanh trinh han luong cong ((dan toan) OR (manh toan)) tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (hieu lang)) - thanh trinh han luong cong ((dan toan) OR (manh toan)) tap~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (hieu lang)) - thanh trinh han luong cong ((dan toan) OR (manh toan)) tap*.