Perhaps you should try some spelling variations:
hoang manh » hoang minh, hoang anh, hoang xanh
dan manh » dang manh, doan manh, van manh
tu sach » thu sach, su sach, te sach
na thuc » nam thuc, na thuoc, va thuc
hieu le » hieu ve, hieu he, tieu le
hieu ly » hieu ky, lieu ly, dieu ly
co viet » so viet, o viet, hoc viet
y nang » ky nang, ly nang, v nang
vai co » mai co, tai co, voi co
x hoi » xa hoi, o hoi, x ho

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 sach y nang x hoi. ((hieu le) OR (hieu ly)) na thuc ((dan manh) OR (hoang manh)) vai co viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang x hoi. ((hieu le) OR (hieu ly)) na thuc ((dan manh) or (hoang manh)) vai co viet~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. ((hieu le) OR (hieu ly)) na thuc ((dan manh) or (hoang manh)) vai co viet*.