Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, nhieu tang, hieu van
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
cong dan » cong san, cong tan, huong dan
dan quan » van quan, ban quan, dan luan
quan ban » quang ban, qua ban, quan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sang) OR (hieu lang)) - hanh ((trung cua) or (trung cap)) nhung cong dan quan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hieu lang)) - hanh ((trung cua) OR (trung cap)) nhung cong dan quan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) OR (hieu lang)) - hanh ((trung cua) or (trung cap)) nhung cong dan quan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) OR (hieu lang)) - hanh ((trung cua) or (trung cap)) nhung cong dan quan ban*.