Perhaps you should try some spelling variations:
khong cuong » khong xuong, hong cuong, thong chuong
chieu sang » chieu sach, chieu xanh, hieu lang
trung tuan » trung thanh, trung tam, truong thanh
tran tuan » tran xuan, tran quang, tran thanh
ho chieu » theo chieu, hoc thieu, doi chieu
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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 - manh ((trung tuan) OR (tran tuan)) khong cuong ((dan toan) OR (dan than)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - manh ((trung tuan) or (tran tuan)) khong cuong ((dan toan) OR (dan than)) cau~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - manh ((trung tuan) or (tran tuan)) khong cuong ((dan toan) OR (dan than)) cau*.