Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
nhiet tach » chiet tach
thanh tung » thanh cong
cua thuong » cua truong, cua phuong, ca thuong
hoc nhiet » hoc thiet, hoc nghien, hoc hien
manh toan » thanh toan, anh tuan, tinh toan
tung cua » trung cua, tuong cua, dung cua
dan toan » van toan, dan than, xuan toan

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc nhiet tach - thanh tung cua thuong cong ((dan toan) OR (manh toan)) cao~".
• Adding a wildcard symbol may retrieve word variants: hoc nhiet tach - thanh tung cua thuong cong ((dan toan) OR (manh toan)) cao*.