Perhaps you should try some spelling variations:
hien xanh » hien hanh, hien nhanh, chieu xanh
tranh cua » doanh cua, manh cua
dung song » dung cong, dung dong, vung song
tang cua » mang cua, hang cua, tang luan
song van » hoang van, trong van, duong van
van tinh » van thinh, van minh, ban tinh
toan » tran

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 ((tang cua) or (tranh cua)) dung song van tinh toan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh ((tang cua) OR (tranh cua)) dung song van tinh toan.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh ((tang cua) or (tranh cua)) dung song van tinh toan*.