Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
dung cong » dung trong
thanh lap » thanh san, phan lap, thanh hai
cong san » cong tac
than cap » khan cap, thanh cac, than cua

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 - hanh ((trung cua) or (trung tam)) dung cong san ((than cap) OR (thanh lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh ((trung cua) OR (trung tam)) dung cong san ((than cap) OR (thanh lap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - hanh ((trung cua) or (trung tam)) dung cong san ((than cap) OR (thanh lap))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh ((trung cua) or (trung tam)) dung cong san ((than cap) OR (thanh lap))*.