Perhaps you should try some spelling variations:
truong tinh » truong kinh, truong minh, truong dinh
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
trung quan » truong quan, trong quan, trung tuan
trong tinh » trong kinh, trong sinh, trong linh
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.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) or (hieu qua)) - thanh trung quan dung ((trong tinh) OR (truong tinh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu qua)) - thanh trung quan dung ((trong tinh) OR (truong tinh)) 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 tinh) OR (truong tinh)) toan tap*".