Perhaps you should try some spelling variations:
thieu quang » thien quan, trien quang, hieu quan
thanh trung » thanh tung
hieu quang » hieu quan, hieu qua, diep quang
trung cua » truong cua, trung tuan, trung cap
dung cong » dung trong
thanh lap » thanh san, phan lap, thanh hai
thanh cha » thanh ha, thanh nha, thanh phan
cua dung » cua dang, cua dong, qua dung
cong san » cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((hieu quang) OR (thieu quang)) - thanh trung cua dung cong san ((thanh lap) or (thanh cha))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu quang) OR (thieu quang)) - thanh trung cua dung cong san ((thanh lap) OR (thanh cha))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((hieu quang) OR (thieu quang)) - thanh trung cua dung cong san ((thanh lap) or (thanh cha))*".