Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
tran chau » tranh chap, tran huu
cua dung » cua dong, qua dung, cua rung
cua dang » cua cong, cua ban
cong san » cong tac
san tran » tan tran, ban tran, dang tran

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - thanh trung ((cua dung) OR (cua dang)) cong san tran chau~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh trung ((cua dung) OR (cua dang)) cong san tran chau*.