Perhaps you should try some spelling variations:
xa thanh » va thanh, ha thanh, ta thanh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
tai cua » thai cua, tai cuc, tri cua
xa hanh » xa khanh, va hanh, da hanh
nay tuc » nay tu, cay thuc, day thuc
hieu va » lieu va, hieu qua
tao hoa » bao hoa, tao hoi, tao hop
ky sang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
va nay » va ngay, va cay
tao ho » tao hoi, tao cho, tao hop

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky sang ((tao hoa) OR (tao ho)). hieu va nay tuc ((xa hanh) or (xa thanh)) tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky sang ((tao hoa) OR (tao ho)). hieu va nay tuc ((xa hanh) OR (xa thanh)) tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky sang ((tao hoa) OR (tao ho)). hieu va nay tuc ((xa hanh) or (xa thanh)) tai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky sang ((tao hoa) OR (tao ho)). hieu va nay tuc ((xa hanh) or (xa thanh)) tai cua tre*.