Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, cay thuoc
nha thuoc » nha nuoc, nhan thuc, nha hoc
hanh hai » thanh hai, nhanh hai, hang hai
hai hau » hai chau, dai hau, hai hai
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
cao hoi » cau hoi, co hoi, cao hoc
ly nang » ky nang, ly hang, ly vang
hau thi » khau thi, cau thi, ha thi
y nang » ky nang, v nang, may nang

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 ((y nang) OR (ly nang)) cao hoi. hieu va ((nam thuoc) OR (nha thuoc)) va hanh hai hau thi~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (ly nang)) cao hoi. hieu va ((nam thuoc) OR (nha thuoc)) va hanh hai hau thi".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) OR (ly nang)) cao hoi. hieu va ((nam thuoc) OR (nha thuoc)) va hanh hai hau thi*.