Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
trung dieu » trong dieu, trung hieu, truong dien
cong cong » cong dong, dung cong, dang cong
tan khan » tan khang, tan nhan, toan khoan
khan cap » khan ap, than cap, khoan cam

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)) - sinh trung dieu ((cong cong) or (trong cong)) tan khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sach)) - sinh trung dieu ((cong cong) OR (trong cong)) tan khan cap.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sach)) - sinh trung dieu ((cong cong) or (trong cong)) tan khan cap*.