Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
trong quan » thong quan, tong quan, thong quang
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
trung cap » truong cao, trung tam
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 - hanh ((trong quan) or (trung cap)) thong cong dan chan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh ((trong quan) OR (trung cap)) thong cong dan chan cap.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh ((trong quan) or (trung cap)) thong cong dan chan cap*.