Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
loai nang » loai nam, luan nang, loai san
hanh dinh » thanh dinh, hinh dinh, hanh tinh
tu sach » thu sach, su sach, te sach
lo nang » ho nang, ly nang, cao nang
dinh cu » dinh cuu, dinh chuc, dinh chau
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
ma hoi » mai hoi, xa hoi, ma hoa
cu tre » cu tren, cua tre, cuu tre

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 ((lo nang) OR (loai nang)) ma hoi. hieu va ((cam tuc) or (nam thuoc)) va hanh dinh cu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((lo nang) OR (loai nang)) ma hoi. hieu va ((cam tuc) OR (nam thuoc)) va hanh dinh cu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((lo nang) OR (loai nang)) ma hoi. hieu va ((cam tuc) or (nam thuoc)) va hanh dinh cu tre*".