Perhaps you should try some spelling variations:
mai khoi » mai khoa, tai khoa, cac khoi
khai luc » khai luoc, khai luan, nhan luc
cau treo » cau theo, cau tren, cau triet
mai hoi » dai hoi, lai hoi, mai doi
hieu va » lieu va, hieu qua
va khai » van khai, va khao, va kha
va hanh » van hanh, va thanh, va danh
su hai » su tai
hai ky » thai ky, hoi ky, hai ly
ma hoi » xa hoi, ma hoa, me hoi
luc va » duc va, tuc va, loc va
vi cau » va cau, ve cau, di cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: su hai ky nang ((ma hoi) or (((mai hoi) OR (mai khoi)))). hieu va khai luc va hanh vi cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su hai ky nang ((ma hoi) OR (((mai hoi) OR (mai khoi)))). hieu va khai luc va hanh vi cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su hai ky nang ((ma hoi) or (((mai hoi) OR (mai khoi)))). hieu va khai luc va hanh vi cau treo".
• Adding a wildcard symbol may retrieve word variants: su hai ky nang ((ma hoi) or (((mai hoi) OR (mai khoi)))). hieu va khai luc va hanh vi cau treo*.