Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
trong quan » thong quan, tong quan, thong quang
trung tuan » trung thanh, trung tam, tran tuan
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
cong san » cong tac
san than » sang than, san thanh, ban than
than cau » toan cau, phan cau, than cap

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 - thanh ((trong quan) or (trung tuan)) thong cong san than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh ((trong quan) OR (trung tuan)) thong cong san than cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh ((trong quan) or (trung tuan)) thong cong san than cau*.