Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
hanh tai » thanh tai, hang tai, han tai
su sach » vu sach
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
tai cua » thai cua, tai cuc, tri cua
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
so sach » so sanh, bo sach, co sach
ma hoi » mai hoi, xa hoi, ma hoa

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) or (so sach)) ky nang ma hoi. hieu ve ((cam tuc) or (nam thuoc)) va hanh tai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang ma hoi. hieu ve ((cam tuc) OR (nam thuoc)) va hanh tai cua vat.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky nang ma hoi. hieu ve ((cam tuc) or (nam thuoc)) va hanh tai cua vat*.