Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
trong chuan » thong chuan, trong chan, trong thuan
chuan dang » chan dang, chuan trang, chuan doan
hien hanh » dieu hanh
dang cong » dung cong
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien hanh - thanh trong chuan dang cong ((dan toan) or (dan than)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - thanh trong chuan dang cong ((dan toan) OR (dan than)) ban*.