Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
ve triet » va trien, su triet
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
qua cau » quan cau, qua cac, qua ca
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » tuc va, luc va, xac va
vi ve » va ve, gi ve, ve ve

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 ky nang ma hoi. hieu qua cau ((xuc va) OR (duc va)) hanh vi ve triet~.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ma hoi. hieu qua cau ((xuc va) or (duc va)) hanh vi ve triet*.