Perhaps you should try some spelling variations:
cac triet » cac thiet, cac trieu, cau triet
hieu van » thien van, lieu va, hieu ve
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
lam luc » lao luc, lam duoc
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
x hoi » xa hoi, o hoi, x ho

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 ky nang x hoi. ((hieu van) or (hieu va)) lam luc ((va hanh) OR (va danh)) va cac triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. ((hieu van) OR (hieu va)) lam luc ((va hanh) OR (va danh)) va cac triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. ((hieu van) or (hieu va)) lam luc ((va hanh) OR (va danh)) va cac triet*".