Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
trung va » truong va, trang va, trung ha
cong ban » cong bang, cong tan, cong dan
cong san » cong tac
phan cau » phan dau, phan cac, phan lap
va lang » va nang, hoa lang

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 lang ((cong ban) or (cong san)) ((phan cau) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh trung va lang ((cong ban) OR (cong san)) ((phan cau) OR (phan tu)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh trung va lang ((cong ban) or (cong san)) ((phan cau) or (phan tu))*.