Perhaps you should try some spelling variations:
minh truong » minh tuong, sinh truong, minh thuong
thanh trung » thanh tung
thanh hung » thanh huong, thanh tung, thanh cong
hieu sang » chieu sang, hieu lang, hieu quang
luong tai » dung tai, luong va
doc hieu » toc thieu, hoc thieu, hoc hien
tai toan » bai toan, tap toan, tai tuan
toan ban » van ban

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 - minh truong ((thanh hung) or (thanh trung)) luong tai toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - minh truong ((thanh hung) OR (thanh trung)) luong tai toan ban.
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - minh truong ((thanh hung) or (thanh trung)) luong tai toan ban*.