Perhaps you should try some spelling variations:
thanh sinh » thanh binh, thanh tinh, thanh vinh
hieu sang » chieu sang, hieu lang, hieu quang
vien hung » viet hung, tien hung, pien hung
cong dang » cong dong, cong dung, cong danh
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
thanh ca » thanh cha, thanh cac, thanh ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu sang - thanh sinh vien hung ((cong dan) or (cong dang)) thanh ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - thanh sinh vien hung ((cong dan) OR (cong dang)) thanh ca*.