Perhaps you should try some spelling variations:
cong thang » cong thanh, cang thang, cong thong
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
toan thuc » toan hoc, dan thuc, nhan thuc
thuc hung » thuc chung, thuc nhung, thuc dung
cong tan » cong tac, cong san, cong thanh
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 - tinh toan thuc hung ((cong thang) or (cong tan)) phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - tinh toan thuc hung ((cong thang) OR (cong tan)) phan cac.
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - tinh toan thuc hung ((cong thang) or (cong tan)) phan cac*.