Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
sach thu » sach thue, sach thieu, sach tham
sang tao » hang tai
van hanh » van thanh, ban hanh, van anh
lai cua » dai cua, hai cua, lai chau
va hanh » va thanh, va danh, ban hanh
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
sach tu » cach tu, sach ty, sach uu
tao hoi » tao khoi, tao boi, tay hoi
cua tre » cua te, cuu tre, cua triet

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 tu) OR (sach thu)) sang tao hoi. hieu vu cham duc ((va hanh) or (van hanh)) lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tu) OR (sach thu)) sang tao hoi. hieu vu cham duc ((va hanh) OR (van hanh)) lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach tu) OR (sach thu)) sang tao hoi. hieu vu cham duc ((va hanh) or (van hanh)) lai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach tu) OR (sach thu)) sang tao hoi. hieu vu cham duc ((va hanh) or (van hanh)) lai cua tre*.