Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
thuc hung » thuc chung, thuc nhung, thuc dung
hung cong » nhung cong, hung cuong, phung cong
cong toan » cong tan, cong hoan, cong tuan
toan phan » thanh phan, toan ban, hoa phan
tinh dan » trinh dan, tinh da, tinh dau
binh dan » minh danh, binh dinh, binh luan
phan cac » nhan cach, phan dau, phan lap

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)) - ((tinh dan) OR (binh dan)) thuc hung cong toan phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sang)) - ((tinh dan) OR (binh dan)) thuc hung cong toan phan cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chieu sang)) - ((tinh dan) OR (binh dan)) thuc hung cong toan phan cac".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sang)) - ((tinh dan) OR (binh dan)) thuc hung cong toan phan cac*.