Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
hanh doanh » hang doanh, chinh doanh, kinh doanh
bang cong » dang cong, bang song, hang cong
cong tuan » cong tan, cong luan, cong thanh
tuan phan » luan phan, toan phan, tuan pham
cua bang » chua bang, cua ban, cua dang
phan dau » phan tu, hang dau

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 xanh) or (chieu sang)) - ((hanh doanh) OR (doanh doanh)) cua bang cong tuan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sang)) - ((hanh doanh) OR (doanh doanh)) cua bang cong tuan phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chieu sang)) - ((hanh doanh) OR (doanh doanh)) cua bang cong tuan phan dau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sang)) - ((hanh doanh) OR (doanh doanh)) cua bang cong tuan phan dau*.