Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
tao khoi » tao hoi, thao khoa, tao boi
than tai » thanh tai, toan tai, nhan tai
lao khoa » lo khoa, da khoa, ly khoa
su sach » so sach, vu sach
han tai » hang tai, nhan tai, van tai
thuc xa » thuc xay, tuc xa, thuc va
cua tre » cua te, cuu tre, cua triet
ky sang » ky nang, ky dang, ky tang
sach ky » sac ky, sach y, sach ty
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: su sach ky sang ((tao khoi) or (lao khoa)). lieu va nam thuc xa ((han tai) or (than tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky sang ((tao khoi) OR (lao khoa)). lieu va nam thuc xa ((han tai) OR (than tai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky sang ((tao khoi) or (lao khoa)). lieu va nam thuc xa ((han tai) or (than tai)) cua tre*.