Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
thinh chat » tinh chat, trinh chat, thinh phat
tinh dinh » trinh dinh, tinh ninh, tinh binh
tan thinh » van thinh, tien thinh, tai chinh
cong tan » cong tac, cong san, cong thanh
dinh va » dinh van, dinh ve, tinh va

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 sach)) - tinh dinh va nhung cong tan thinh chat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sach)) - tinh dinh va nhung cong tan thinh chat*.