Perhaps you should try some spelling variations:
trong luong » trong tuong, thuong luong, trong thuong
chieu sang » chieu sach, chieu xanh, hieu lang
theo luong » tien luong
doi chieu » doc hieu, doi chi, ho chieu
hanh tang » hanh trang, anh tang, hanh mang
toan ban » van ban
tang ca » tang cua, hang ca, tang ma

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: doi chieu sang - hanh tang ca ((trong luong) OR (theo luong)) tinh toan ban~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - hanh tang ca ((trong luong) or (theo luong)) tinh toan ban*.