Perhaps you should try some spelling variations:
tru nang » tri nang, truc nano, thi nang
tra nang » thi nang, kha nang, da nang
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, ban hanh
hieu ve » hieu va, hieu van
dao duc » giao duc, tao duoc
va danh » va dinh, va dan, dia danh
va cua » va chua, via cua, ca cua
ve dao » de dao, va dao, ve bao
cua te » cua tu

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 ((tru nang) OR (tra nang)) xa hoi. hieu ve dao duc ((va danh) OR (va hanh)) va cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((tru nang) or (tra nang)) xa hoi. hieu ve dao duc ((va danh) OR (va hanh)) va cua te~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((tru nang) or (tra nang)) xa hoi. hieu ve dao duc ((va danh) OR (va hanh)) va cua te*.