Perhaps you should try some spelling variations:
nam thuoc » nam thu, nha thuoc, cay thuoc
nam thuc » am thuc, nam thu, nam tu
te sach » toc sach
vai cuu » vai cua
dan vai » dan va, dan tai, dan vat
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
xay hoi » tay hoi, cay phoi, gay thoi
ky dang » ky nang, ky danh
va dan » ca dan, va dao, va dau

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

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