Perhaps you should try some spelling variations:
nam thuoc » nam thu, nha thuoc, cay thuoc
sach thu » sach thue, sach thieu, sach tham
thu tang » thu trang, thu thang, thu hang
nam thuc » am thuc, nam thu, nam tu
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
ma hoi » mai hoi, ma hoa, me hoi
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thu tang ((ma hoi) or (xa hoi)). hieu ve ((nam thuc) or (nam thuoc)) va hanh vi cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu tang ((ma hoi) OR (xa hoi)). hieu ve ((nam thuc) OR (nam thuoc)) va hanh vi cua vat.
• Adding a wildcard symbol may retrieve word variants: su sach thu tang ((ma hoi) or (xa hoi)). hieu ve ((nam thuc) or (nam thuoc)) va hanh vi cua vat*.