Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thanh dung » thanh duong, thanh tung, thanh hung
hien sang » hien trang, khien bang, thien bang
luan ung » luan hung, luon ung, luan chung
ung cong » dung cong, luong cong, duong cong
dan toan » van toan, dan than, manh toan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien sang) OR (chieu sang)) - thanh dung luan ung cong ((dan toan) or (anh tuan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien sang) OR (chieu sang)) - thanh dung luan ung cong ((dan toan) OR (anh tuan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien sang) OR (chieu sang)) - thanh dung luan ung cong ((dan toan) or (anh tuan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien sang) OR (chieu sang)) - thanh dung luan ung cong ((dan toan) or (anh tuan)) cao*.