Perhaps you should try some spelling variations:
phuong duong » phuong dung, chuong duong, phuong dong
phuong luong » thuong luong, phuong dung, chuong duong
hieu tinh » chieu tinh, lieu tinh, kieu tinh
hanh dung » thanh dung, anh dung, hanh dong
doc hieu » toc thieu, hoc thieu, hoc hien
van than » van thanh, van thang, van tuan
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu tinh - hanh dung luan ((phuong luong) or (phuong duong)) van than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu tinh - hanh dung luan ((phuong luong) OR (phuong duong)) van than cau.
• Adding a wildcard symbol may retrieve word variants: doc hieu tinh - hanh dung luan ((phuong luong) or (phuong duong)) van than cau*.