Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
chieu sang » chieu sach, chieu xanh, nhieu tang
dong phong » duong phong, dong phuong, dong thong
hieu lang » hieu quang, nhieu tang, hieu van
doanh cua » doanh luan
manh toan » thanh toan, anh tuan, tinh toan
cua dong » chua dong, cua cong, cua dang
van tan » van tuan, van ban, van tai

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

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