Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
thang cua » thong cua, hang cua, than cua
manh toan » thanh toan, anh tuan, tinh toan
tang cua » mang cua, hang cua, tang luan
dan toan » van toan, dan than, xuan toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - hanh ((thang cua) or (tang cua)) nhung cong ((dan toan) or (manh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh ((thang cua) OR (tang cua)) nhung cong ((dan toan) OR (manh toan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh ((thang cua) or (tang cua)) nhung cong ((dan toan) or (manh toan)) cau*.