Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien xanh » hien hanh, hien nhanh, chieu xanh
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, trung cap
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cau » toan cau, phan cau, than cap

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 hien xanh - thanh ((trung va) OR (trung ha)) nhung cong tac than cau~".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh ((trung va) OR (trung ha)) nhung cong tac than cau*.