Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
chieu sang » chieu sach, chieu xanh, hieu lang
nhung vung » nhung dung, nhung huong, nhung tuong
vung manh » hung manh, tung manh, vung lanh
manh toan » thanh toan, anh tuan, tinh toan
ho chieu » theo chieu, hoc thieu, doi chieu
toan ban » van ban
ban cua » ban quan

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 - hanh ((ban cua) OR (trung tuan)) nhung vung manh toan ban~.
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - hanh ((ban cua) or (trung tuan)) nhung vung manh toan ban*.