Perhaps you should try some spelling variations:
lan thuong » han thuong, hang thuong, phan thuong
lan phuong » van phuong, dan phuong, bang phuong
hanh dung » thanh dung, anh dung, hanh dong
luong dan » huong dan, luong dao, luong van
doc lieu » duoc lieu, du lieu, so lieu
doc hieu » toc thieu, hoc thieu, hoc hien
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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: ((doc lieu) OR (doc hieu)) tinh - hanh dung ((lan thuong) OR (lan phuong)) luong dan than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc lieu) OR (doc hieu)) tinh - hanh dung ((lan thuong) or (lan phuong)) luong dan than cau~".
• Adding a wildcard symbol may retrieve word variants: ((doc lieu) OR (doc hieu)) tinh - hanh dung ((lan thuong) or (lan phuong)) luong dan than cau*.