Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
sach kem » hanh kem
cham xuc » cam xuc, chat xuc, cham soc
xuc van » duc van, luc van, xuc ban
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
sach ky » sac ky, sach y, sach hay
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((((sach ky) OR (sach kem))) or (sach ty)) nang ma hoa. hieu ve cham xuc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach ky) OR (sach kem))) OR (sach ty)) nang ma hoa. hieu ve cham xuc van hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((((sach ky) OR (sach kem))) or (sach ty)) nang ma hoa. hieu ve cham xuc van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((((sach ky) OR (sach kem))) or (sach ty)) nang ma hoa. hieu ve cham xuc van hanh vi cua tre*.