Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
nam thuoc » nam thuc, nam thu, nha thuoc
thuoc ca » thuoc cao, thuoc ma, thuoc va
vai cuu » vai cua
dan vai » dan va, dan tai, dan vat
cuu tre » cua tre, cau tren, cau treo
hieu va » hieu qua
ky danh » ky anh
ky dang » ky nang
ca dan » cac dan, ca dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ((ky dang) or (ky danh)) xa hoi. ((hieu va) OR (lieu va)) nam thuoc ca dan vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((ky dang) OR (ky danh)) xa hoi. ((hieu va) OR (lieu va)) nam thuoc ca dan vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ((ky dang) or (ky danh)) xa hoi. ((hieu va) OR (lieu va)) nam thuoc ca dan vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((ky dang) or (ky danh)) xa hoi. ((hieu va) OR (lieu va)) nam thuoc ca dan vai cuu tre*.