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
tam tong » tai tong, tam nong, tam thuong
tam song » tam nong, lam song, ta song
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cap » khan cap, than cap, cao 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 trung ((tam tong) or (tam song)) cong dan chan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh trung ((tam tong) OR (tam song)) cong dan chan cap.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh trung ((tam tong) or (tam song)) cong dan chan cap*.