Perhaps you should try some spelling variations:
cham cuu » cap cuu, chat cua
luat cua » luat sua, xuat cua, quat cua
cham luc » cham soc, nhan luc, chat lua
lua cua » qua cua, xua cua
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. hieu va ((cham luc) OR (cham cuu)) va hanh ((luat cua) OR (lua cua)) viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ma hoi. hieu va ((cham luc) or (cham cuu)) va hanh ((luat cua) OR (lua cua)) viet~".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. hieu va ((cham luc) or (cham cuu)) va hanh ((luat cua) OR (lua cua)) viet*.