Perhaps you should try some spelling variations:
phung cong » nhung cong, phong cong, nhung chong
luan phung » luan phuong, luan chung, luan phong
hanh dong » anh dong, ha dong
dong luan » dung luan, tong luan, dong xuan
dan than » dan chan, van than, dan toan
ban than » ban thanh, van thanh, ban hang
chu han » chu van

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chuc nang) OR (chu han)) - hanh dong luan phung cong ((dan than) OR (ban than)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chuc nang) or (chu han)) - hanh dong luan phung cong ((dan than) OR (ban than)) cau~".
• Adding a wildcard symbol may retrieve word variants: theo ((chuc nang) or (chu han)) - hanh dong luan phung cong ((dan than) OR (ban than)) cau*.