Perhaps you should try some spelling variations:
trien hoat » tien hoa
quan thanh » ban thanh, van thanh
dinh quan » dinh quang, dinh xuan, dinh duan
thanh van » thanh san, thanh toan, thanh phan
hieu soat » hieu suat, hieu luat, hieu so
kiem soat » kiem toan
hieu hoat » hieu hoa, thien hoat, hieu luat

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: dinh quan thanh van ((((hieu soat) OR (kiem soat))) OR (((hieu hoat) OR (trien hoat))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dinh quan thanh van ((((hieu soat) OR (kiem soat))) or (((hieu hoat) or (trien hoat))))~".
• Adding a wildcard symbol may retrieve word variants: dinh quan thanh van ((((hieu soat) OR (kiem soat))) or (((hieu hoat) or (trien hoat))))*.