Perhaps you should try some spelling variations:
hien tinh » khien tinh, thien tinh, bien tinh
hanh mang » nhanh mang, hanh trang, nhanh lang
mang luan » tang luan, hang luan, bang luan
cong cong » trong cong, dung cong, dang cong
manh toan » thanh toan, anh tuan, tinh 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 tinh - hanh mang luan ((cong cong) or (cong dong)) ((manh toan) or (dan than)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien tinh - hanh mang luan ((cong cong) OR (cong dong)) ((manh toan) OR (dan than)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc hien tinh - hanh mang luan ((cong cong) or (cong dong)) ((manh toan) or (dan than)) ban*.