Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
cong toan » cong tan, cong hoan, cong tuan
toan phan » thanh phan, toan ban, hoa phan
hanh han » hanh nhan, hanh phan, hanh san
phan tap » phan lap, han tap, pha tap

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 - hanh han ((va thuong) or (he thong)) cong toan phan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh han ((va thuong) OR (he thong)) cong toan phan tap*.