Perhaps you should try some spelling variations:
chat luc » chat xuc, chat lua, nhan luc
hieu van » hieu va, thien van, lieu va
van chat » cao chat
mai hoi » mai khoi, dai hoi, lai hoi
sach ky » sac ky, sach y, sach ty
va hang » van hang, va nang, va lang
doi cua » dai cua, hoi cua
su sach » so sach, vu sach
luc va » duc va, tuc va, loc va
di cua » dai cua, de cua, do cua

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 ky nang ((ma hoa) OR (mai hoi)). hieu van chat luc va hang ((di cua) OR (doi cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((ma hoa) or (mai hoi)). hieu van chat luc va hang ((di cua) OR (doi cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((ma hoa) or (mai hoi)). hieu van chat luc va hang ((di cua) OR (doi cua)) triet*.