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 cua » truong cua, trung tuan, trung cap
tong cong » trong cong, cong cong, dang cong
dung cong » dung trong
toan tap » toan ban
toan cao » toan 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 trung cua ((tong cong) or (dung cong)) tac ((toan tap) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - thanh trung cua ((tong cong) OR (dung cong)) tac ((toan tap) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh trung cua ((tong cong) or (dung cong)) tac ((toan tap) or (toan cao))*.