Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thanh trung » thanh tung
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
phan cac » nhan cach, phan dau, phan lap

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 - thanh trung cua thong ((cong dan) or (cong san)) phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu quang - thanh trung cua thong ((cong dan) OR (cong san)) phan cac.
• Adding a wildcard symbol may retrieve word variants: hoc thieu quang - thanh trung cua thong ((cong dan) or (cong san)) phan cac*.