Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cham loc » cham soc, chon loc, cham o
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
loc va » hoc va, luc va
vi cua » vai cua, di cua

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: thu sach ((y nang) OR (v nang)) xa hoi. ((hieu ve) OR (hieu va)) cham loc va hanh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: thu sach ((y nang) or (v nang)) xa hoi. ((hieu ve) or (hieu va)) cham loc va hanh vi cua tre*.