Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
toc sach » hoc sach, doc sach, thuoc sach
van vat » van chat, nhan vat
dan vai » dan va, dan tai, dan vat
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
nam tu » nam thu, nam thuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky lang xa hoi. lieu va ((nam tu) or (nam thuoc)) va ((dan vai) or (van vat)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky lang xa hoi. lieu va ((nam tu) OR (nam thuoc)) va ((dan vai) OR (van vat)) cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ky lang xa hoi. lieu va ((nam tu) or (nam thuoc)) va ((dan vai) or (van vat)) cua tre*.