Perhaps you should try some spelling variations:
hanh dan » thanh dan, hanh san, canh dan
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cuu tre, cua triet
cac xuc » cam xuc, cac nuoc, chat xuc
dan cua » dan ca, ban cua, dai cua
sach ty » sach y, sach tu, sach thu
tay hoi » tay ho, tay thai
xuc van » duc van, luc van, vuc van
tao hoi » tao khoi, tao boi, thao hoc
hieu va » lieu va, hieu qua
sac ky » cac ky, sai ky

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

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