Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
thuoc va » thuc va, thuoc ma, thuong va
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
thi van » thi lan, thi hanh, thi nang
cua tre » cua te, cuu tre, cua triet
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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 ly nang x hoi. ((lieu va) or (((thien van) or (thi van)))) nam thuoc va dan vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang x hoi. ((lieu va) OR (((thien van) OR (thi van)))) nam thuoc va dan vi cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ly nang x hoi. ((lieu va) or (((thien van) or (thi van)))) nam thuoc va dan vi cua tre*.