Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
truong cao » truong dai
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
trung hoc » trung quoc
dan phan » doan phan, van phan, dam phan
dan chan » dan gian, dan ca, van chat

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu tinh - hanh ((trung hoc) OR (truong cao)) nhung cong ((dan phan) OR (dan chan)) cac~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu tinh - hanh ((trung hoc) or (truong cao)) nhung cong ((dan phan) OR (dan chan)) cac~".
• Adding a wildcard symbol may retrieve word variants: doi chieu tinh - hanh ((trung hoc) or (truong cao)) nhung cong ((dan phan) OR (dan chan)) cac*.