Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
thanh va » thanh van, hanh va, thanh ha
ma thanh » mai thanh, va thanh, ha thanh
thuoc ma » hoc ma, duoc ma
thu sach » tu sach, thuat sach, thuoc sach
mai hoi » mai khoi, dai hoi, lai hoi
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
huu tre » cuu tre, huu them, huu tien
huu tri » huu tai
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: thu sach ly nang ((xa hoi) or (mai hoi)). lieu va nam thuoc ma thanh va ((huu tre) or (huu tri))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ly nang ((xa hoi) OR (mai hoi)). lieu va nam thuoc ma thanh va ((huu tre) OR (huu tri)).
• Adding a wildcard symbol may retrieve word variants: thu sach ly nang ((xa hoi) or (mai hoi)). lieu va nam thuoc ma thanh va ((huu tre) or (huu tri))*.