Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, hang cong
cong quang » luong quang, thong quang, duong quang
doi chieu » doc hieu, doi chi, ho chieu
trung va » truong va, trang va, trung ha
bac cao » bao cao, bac can, bac cau
ban can » ban dan, ban hang, ban hanh

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 xanh - thanh trung va nhung cong quang ((bac cao) or (ban can))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - thanh trung va nhung cong quang ((bac cao) OR (ban can)).
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - thanh trung va nhung cong quang ((bac cao) or (ban can))*.