Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
chieu sang » chieu sach, chieu xanh, hieu lang
doi chieu » doc hieu, doi chi, ho chieu
cong tanh » cong thanh, cong tinh, cong danh
cac dang » cao dang, cac dan, cac cong
cong tan » cong tac, cong san, cong thanh
ban ban » ban banh, van ban, can ban

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 trong cac dang ((cong tanh) or (cong tan)) ban ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh trong cac dang ((cong tanh) OR (cong tan)) ban ban.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh trong cac dang ((cong tanh) or (cong tan)) ban ban*.