Perhaps you should try some spelling variations:
nam thuoc » nam thu, nha thuoc, cay thuoc
nam thuc » am thuc, nam thu, nam tu
tu sach » thu sach, su sach, te sach
vat cuu » vat cua
dan vat » dang vat, van vat, dan va
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
ty hang » ly hang, thi hang, thu hang
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: tu sach ((ty xang) or (ty hang)) xa hoi. hieu ve ((nam thuc) or (nam thuoc)) va dan vat cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty xang) OR (ty hang)) xa hoi. hieu ve ((nam thuc) OR (nam thuoc)) va dan vat cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty xang) or (ty hang)) xa hoi. hieu ve ((nam thuc) or (nam thuoc)) va dan vat cuu tre*.