Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, hieu lang
trung cap » truong cao, trung tam
dong cong » duong cong, dung cong, dang cong
cap dong » cao dong, cau dong, ca dong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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: hoc ((thieu sang) or (thieu quang)) - thanh trung cap dong cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu quang)) - thanh trung cap dong cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (thieu quang)) - thanh trung cap dong cong tac toan cau*.