Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thanh dung » thanh duong, thanh tung, thanh hung
hieu manh » chieu xanh, hieu nganh, dieu hanh
cong vinh » trong vinh, cong viec, cong viet
dung cua » dung luan, dung cho
cua dung » cua dang, cua dong, qua dung
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu manh) or (chieu sang)) - thanh dung cua dung ((cong vinh) OR (cong trinh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (chieu sang)) - thanh dung cua dung ((cong vinh) OR (cong trinh)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu manh) or (chieu sang)) - thanh dung cua dung ((cong vinh) OR (cong trinh)) toan tap".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chieu sang)) - thanh dung cua dung ((cong vinh) OR (cong trinh)) toan tap*.