Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
quang nhung » quang hung, quan nhung, quang phuong
chieu sang » chieu sach, chieu xanh, nhieu tang
tran doanh » toan doanh, trai doanh, tran danh
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, nhieu tang, hieu van
ban thanh » ban hanh, ban hang
thanh cau » thanh chau, thanh mau, nhanh cau
cong ban » cong bang, cong san, cong tan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sang) OR (hieu lang)) - ((doanh doanh) or (tran doanh)) quang nhung cong ban thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hieu lang)) - ((doanh doanh) OR (tran doanh)) quang nhung cong ban thanh cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) OR (hieu lang)) - ((doanh doanh) or (tran doanh)) quang nhung cong ban thanh cau*".