Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
trung va » truong va, trang va, trung ha
dan chan » dan gian, dan ca
van chat » cao chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - thanh trung va nhung cong ((dan chan) or (van chat)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh trung va nhung cong ((dan chan) OR (van chat)) cao.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh trung va nhung cong ((dan chan) or (van chat)) cao*.