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 » vu sach
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua
lam luc » lao luc, lam duoc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
luc va » duc va, tuc va, loc va
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) OR (so sach)) ky nang x hoi. ((hieu van) or (hieu va)) lam luc va hanh va cac triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang x hoi. ((hieu van) OR (hieu va)) lam luc va hanh va cac triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ky nang x hoi. ((hieu van) or (hieu va)) lam luc va hanh va cac triet*".