Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
van lam » van nam
tang ma » mang may, tang van
cua tre » cua te, cuu tre, cua triet
tac ha » bac ha, tac da, tac xa
tuc va » thuc va, truc va, tuc xa
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: tu sach ky ((nang x) OR (tang ma)) hoi. hieu van lam ((tac ha) OR (tuc va)) hanh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang x) or (tang ma)) hoi. hieu van lam ((tac ha) or (tuc va)) hanh vi cua tre*.