Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
thuc phung » thuc chung, thuc nhung, thu phuong
phung cong » nhung cong, phong cong, nhung chong
toan thuc » toan hoc, dan thuc, nhan thuc
cong than » cong thanh, cong thang, cong tan
than phan » thanh phan, toan phan, thanh pham
phan cach » nhan cach, phan cac, phan tach

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sang)) - tinh toan thuc phung cong than phan cach~.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sang)) - tinh toan thuc phung cong than phan cach*.