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