Perhaps you should try some spelling variations:
thieu quang » thien quan, trien quang, hieu quan
hieu quang » hieu quan, hieu qua, diep quang
truong cua » truong ca, truong quan, truong cao
khong cong » thong cong, khong cang, chong cong
trung cua » trung tuan, trung cap, dung cua
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh cac

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 quang) OR (hieu quang)) - thanh ((trung cua) or (truong cua)) khong cong dan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu quang) OR (hieu quang)) - thanh ((trung cua) OR (truong cua)) khong cong dan than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu quang) OR (hieu quang)) - thanh ((trung cua) or (truong cua)) khong cong dan than cap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu quang) OR (hieu quang)) - thanh ((trung cua) or (truong cua)) khong cong dan than cap*.