Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thanh tuong » thanh thuong, thanh tung, thanh huong
tuong cua » truong cua, huong cua, thong cua
cua trong » cua truong, cua trung, qua trong
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than cap » khan cap, thanh lap, thanh cac
toan cau » toan cao, toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu quang - thanh tuong cua trong ((cong dan) or (cong san)) ((than cap) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu quang - thanh tuong cua trong ((cong dan) OR (cong san)) ((than cap) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: toc thieu quang - thanh tuong cua trong ((cong dan) or (cong san)) ((than cap) or (toan cau))*.