Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
trung quan » truong quan, trong quan, trung tuan
trong minh » truong minh, trong kinh, trong sinh
thong minh » thong tin, hoang minh
quan dung » quang dung, quan duong, qua dung
toan tap » toan ban

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 ((chieu sang) OR (hieu qua)) - thanh trung quan dung ((trong minh) OR (thong minh)) toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu qua)) - thanh trung quan dung ((trong minh) OR (thong minh)) toan tap~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu qua)) - thanh trung quan dung ((trong minh) OR (thong minh)) toan tap*.