Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
cao hoc » co hoc, cho hoc, chat hoc
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
sach ky » sac ky, sach ty, sach kem
va hanh » van hanh, va thanh, va danh
dau cuu » dau cua, dau cuoi
cuu tre » cua tre, cau tren, cau treo
va dau » va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach ky) or (sach y)) nang cao hoc. hieu ve cham xuc ((va hanh) or (va dau)) dau cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ky) OR (sach y)) nang cao hoc. hieu ve cham xuc ((va hanh) OR (va dau)) dau cuu tre.
• Adding a wildcard symbol may retrieve word variants: toc ((sach ky) or (sach y)) nang cao hoc. hieu ve cham xuc ((va hanh) or (va dau)) dau cuu tre*.