Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
luan nang » luan van, van nang, luan san
nang cong » nang song, dang cong, bang cong
chu xanh » chu manh, chieu xanh, chua xang
tan toan » tan tran, tap toan, dan toan
van toan » van tuan, van tan, van thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chu xanh) or (chiet tach)) - hanh tang luan nang cong ((tan toan) or (van toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu xanh) OR (chiet tach)) - hanh tang luan nang cong ((tan toan) OR (van toan)) cao.
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) or (chiet tach)) - hanh tang luan nang cong ((tan toan) or (van toan)) cao*.