Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
trung cao » truong cao, trung cap, trung co
dung cong » dung trong
cao dung » cao dang, cao dong, cao ung
cong dan » cong san, cong tan, huong dan
toan ban » van ban
khan cap » khan ap, than cap, khoan cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu sang - thanh trung cao dung cong dan ((toan ban) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sang - thanh trung cao dung cong dan ((toan ban) OR (khan cap)).
• Adding a wildcard symbol may retrieve word variants: toc thieu sang - thanh trung cao dung cong dan ((toan ban) or (khan cap))*.