Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hang di » hang doi, hang vi, hang dien
va hang » van hang, va nang, va lang
cau luc » cau truc, cau phuc
hieu va » hieu qua
su sach » so sach, vu sach
mai hoi » mai khoi, dai hoi, lai hoi
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
ma hoi » xa hoi, ma hoa, me hoi
di va » dai va, di vao, doi va

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) OR (mai hoi)). ((lieu va) OR (hieu va)) cau luc va hang di va triet~.
• Adding a wildcard symbol may retrieve word variants: su sach y nang ((ma hoi) or (mai hoi)). ((lieu va) or (hieu va)) cau luc va hang di va triet*.