Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cua » truong cua, trung tuan, trung cap
trong tan » trong quan, trong cac, trong ca
tranh ban » trinh ban, tranh hang, tranh luan
cua dung » cua dang, cua dong, qua dung
tran ban » tran van, toan ban, tran bai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (chieu sang)) - thanh trung cua dung trong tan ((tran ban) OR (tranh ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu manh) or (chieu sang)) - thanh trung cua dung trong tan ((tran ban) OR (tranh ban))~".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chieu sang)) - thanh trung cua dung trong tan ((tran ban) OR (tranh ban))*.