Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hang di » hang doi, hang vi, hang dien
sach ky » sac ky, sach y, sach ty
su sach » so sach, vu sach
mai hoi » mai khoi, dai hoi, lai hoi
va cau » van cau, va cac, va dau
luc va » duc va, tuc va
loc va » hoc va
ma hoi » xa hoi, ma hoa, me hoi
di cua » dai cua, doi cua, de 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 hoi) OR (mai hoi)). lieu va cau ((luc va) OR (loc va)) hang di cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang ((ma hoi) or (mai hoi)). lieu va cau ((luc va) OR (loc va)) hang di cua triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((ma hoi) or (mai hoi)). lieu va cau ((luc va) OR (loc va)) hang di cua triet*.