Perhaps you should try some spelling variations:
lam thuoc » nam thuoc, am thuc, cay thuoc
thuoc van » thuoc va, thuc van, thuoc ban
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, su sach, vu khach
hieu va » lieu va, hieu qua
hieu ve » hieu van
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho
va ve » va le, va vi, va vo
va de » va do, va le

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y nang x hoi. ((hieu ve) or (hieu va)) lam thuoc van hanh ((va ve) OR (va de)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang x hoi. ((hieu ve) OR (hieu va)) lam thuoc van hanh ((va ve) OR (va de)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang x hoi. ((hieu ve) or (hieu va)) lam thuoc van hanh ((va ve) OR (va de)) triet".
• Adding a wildcard symbol may retrieve word variants: vu sach y nang x hoi. ((hieu ve) or (hieu va)) lam thuoc van hanh ((va ve) OR (va de)) triet*.