Perhaps you should try some spelling variations:
thanh trung » thanh tung
truong dong » trong dong, truong dang, tuong dong
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
trung tuan » trung thanh, trung tam, tran tuan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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 (chieu sach)) - thanh trung tuan ((trong cong) or (truong dong)) dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (chieu sach)) - thanh trung tuan ((trong cong) OR (truong dong)) dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) OR (chieu sach)) - thanh trung tuan ((trong cong) or (truong dong)) dan toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) OR (chieu sach)) - thanh trung tuan ((trong cong) or (truong dong)) dan toan cau*.