Perhaps you should try some spelling variations:
hanh cat » hanh cac, hanh luat, nhanh cay
su triet » su viet, su tien, ve triet
vu sach » vu bach, su sach, vu khach
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
cau luc » cau truc, cau phuc
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
va cau » van cau, va cac, va dau
luc va » duc va, tuc va, loc va
cat su » cao su, dat su, sat su

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y nang ((mai hoi) or (xa hoi)). hieu va cau luc va hanh cat su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang ((mai hoi) OR (xa hoi)). hieu va cau luc va hanh cat su triet.
• Adding a wildcard symbol may retrieve word variants: vu sach y nang ((mai hoi) or (xa hoi)). hieu va cau luc va hanh cat su triet*.