Perhaps you should try some spelling variations:
lan phuong » van phuong, dan phuong, bang phuong
lan thuong » han thuong, hang thuong, phan thuong
hieu tinh » chieu tinh, lieu tinh, kieu tinh
hanh dung » thanh dung, anh dung, hanh dong
luong dan » huong dan, luong dao, luong van
doc hieu » toc thieu, hoc thieu, hoc hien
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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 hieu tinh - hanh dung ((lan thuong) OR (lan phuong)) luong dan chan cau~.
• Adding a wildcard symbol may retrieve word variants: doc hieu tinh - hanh dung ((lan thuong) or (lan phuong)) luong dan chan cau*.