Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
cao hoc » co hoc, cho hoc, chat hoc
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
sach ky » sach y, sach ty, sach kem
va hanh » van hanh, va thanh, va danh
dau cua » dai cua, day cua, cau cua
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((sach ky) OR (sac ky)) nang cao hoc. hieu vu cham xuc ((va hanh) or (va dan)) dau cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sach ky) OR (sac ky)) nang cao hoc. hieu vu cham xuc ((va hanh) OR (va dan)) dau cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((sach ky) OR (sac ky)) nang cao hoc. hieu vu cham xuc ((va hanh) or (va dan)) dau cua tre".
• Adding a wildcard symbol may retrieve word variants: hoc ((sach ky) OR (sac ky)) nang cao hoc. hieu vu cham xuc ((va hanh) or (va dan)) dau cua tre*.