Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
su triet » su viet, su tien, ve triet
danh vai » danh sai, danh va, dang van
tang van » dang van, hoang van, trong van
van hoi » van hoa, van hoc, van hoe
hieu ve » hieu va, hieu van
cau cua » cau qua, ca cua, cu cua
ky tang » ky nang, ky dang, kho tang
cua tre » cua te, cuu tre, cua triet
ve cau » ke cau, va cau, ve cac
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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: tu sac ky tang van hoi. hieu ve cau cua ban ((danh vai) OR (doanh van)) ((cua tre) OR (su triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky tang van hoi. hieu ve cau cua ban ((danh vai) OR (doanh van)) ((cua tre) or (su triet))~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky tang van hoi. hieu ve cau cua ban ((danh vai) OR (doanh van)) ((cua tre) or (su triet))*.