Perhaps you should try some spelling variations:
quan luong » luan luong, quan long, quan duong
nhieu tang » chieu sang, nhiet nang
luong cong » dung cong, trong cong, cong cong
hieu lang » chieu sang, hieu quang, hieu van
hanh tang » hanh trang, anh tang, hanh mang
tang quan » tang luan, nang quan, tong quan
hach toan » thanh toan, manh toan
tac toan » tap toan, tam toan, tich toan

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: ho ((hieu lang) OR (nhieu tang)) - hanh tang quan luong cong ((tac toan) OR (hach toan)) tap~.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (nhieu tang)) - hanh tang quan luong cong ((tac toan) or (hach toan)) tap*.