Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
tranh cua » doanh cua, manh cua
trung cua » truong cua, trung tuan, trung cap
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran cau » tran chau, toan cau, ran cau

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 ((tranh cua) or (trung cua)) nhung cong tac tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh ((tranh cua) OR (trung cua)) nhung cong tac tran cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh ((tranh cua) or (trung cua)) nhung cong tac tran cau*.