Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thanh tung » thanh cong
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
tung cao » nung cao, truong cao, trung cap
cao dung » cao dang, cao dong, cao ung
cong ban » cong bang, cong san, cong tan
phan cau » phan dau, phan cac, phan tu
than cap » khan cap, thanh lap, thanh cac

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