Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
chieu sang » chieu sach, chieu xanh, hieu lang
ho chieu » theo chieu, hoc thieu, doi chieu
van dung » van dong, tin dung
cong dan » cong san, cong tan, huong dan
than ma » than man, khan ma, nhan ma
than va » thanh va, nhan va, toan va

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 - thanh tuong ((van dung) OR (xay dung)) cong dan ((than ma) OR (than va))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - thanh tuong ((van dung) or (xay dung)) cong dan ((than ma) OR (than va))~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh tuong ((van dung) or (xay dung)) cong dan ((than ma) OR (than va))*.