Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
sinh trong » sinh truong, sinh trung, dinh trong
toan khoan » toan khoa, toan phan, toan hoat
dieu dung » dieu duong, tieu dung, dieu tuong
dung cong » dung trong
tan khan » tan khang, tan nhan, tran khanh

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 trong dieu dung cong ((tan khan) OR (toan khoan)) cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sach)) - sinh trong dieu dung cong ((tan khan) OR (toan khoan)) cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (chieu sach)) - sinh trong dieu dung cong ((tan khan) OR (toan khoan)) cap".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sach)) - sinh trong dieu dung cong ((tan khan) OR (toan khoan)) cap*.