Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
lam xuc » cam xuc, lam duoc
van lam » van nam
vi cua » vai cua, di cua
xuc va » duc va, tuc va, luc va
cua tu » cua tuc, cua su, cua cu
o hoi » co hoi, o hai, o hoa
o hoc » co hoc, mo hoc, so hoc

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) OR (thu sach)) ky nang ((o hoi) OR (o hoc)). hieu van lam xuc va danh vi cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ky nang ((o hoi) OR (o hoc)). hieu van lam xuc va danh vi cua tu~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang ((o hoi) OR (o hoc)). hieu van lam xuc va danh vi cua tu*.