Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hoc chieu » hoc thieu, ho chieu, hoc hien
tuong cua » truong cua, huong cua, thong cua
tung cua » trung cua, dung cua, tang cua
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan cao » toan ban, toan tap

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: hoc chieu sang - thanh ((tung cua) OR (tuong cua)) nhung ((cong tan) OR (cong san)) toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sang - thanh ((tung cua) OR (tuong cua)) nhung ((cong tan) or (cong san)) toan cao~".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - thanh ((tung cua) OR (tuong cua)) nhung ((cong tan) or (cong san)) toan cao*.