Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
thong cong » trong cong, tong cong, thong thong
hien xanh » hien hanh, hien nhanh, chieu xanh
trung cua » truong cua, trung tuan, trung cap
nhung don » nhung van, nhung bo
van than » van thanh, van thang, van tuan
than cau » toan cau, phan cau, than cap

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) or (chieu sang)) - thanh trung cua ((nhung don) or (thong cong)) van than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (chieu sang)) - thanh trung cua ((nhung don) OR (thong cong)) van than cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) or (chieu sang)) - thanh trung cua ((nhung don) or (thong cong)) van than cau*.