Perhaps you should try some spelling variations:
hieu trach » chiu trach, hieu cach, lieu thach
phap hieu » phan hieu, phap viet
hanh dinh » thanh dinh, hinh dinh, hanh tinh
danh toan » manh toan, dan toan, dang toan
anh manh » lanh manh, anh anh, anh danh
ban cong » bang cong, van cong, phan cong
anh toan » manh toan, anh tuan, thanh 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: phap hieu trach - ((anh manh) OR (hanh dinh)) cua ban cong ((danh toan) OR (anh toan)) cau~.
• Adding a wildcard symbol may retrieve word variants: phap hieu trach - ((anh manh) or (hanh dinh)) cua ban cong ((danh toan) or (anh toan)) cau*.