Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
tao khoi » thao khoa, lao khoa, tao boi
tvan tai » toan tai, tan tai, tuan tai
tu sach » thu sach, su sach, te sach
van tai » von tai, van tuan
thuc xa » thuc xay, tuc xa, thuc va
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
tao hoi » tao boi, tay hoi, thao hoc
ky dang » ky nang, ky danh
va nam » van nam, ha nam, va nay

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 ky dang ((tao khoi) OR (tao hoi)). lieu va nam thuc xa ((van tai) or (tvan tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang ((tao khoi) OR (tao hoi)). lieu va nam thuc xa ((van tai) OR (tvan tai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang ((tao khoi) OR (tao hoi)). lieu va nam thuc xa ((van tai) or (tvan tai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang ((tao khoi) OR (tao hoi)). lieu va nam thuc xa ((van tai) or (tvan tai)) cua tre*.