Perhaps you should try some spelling variations:
mai khoi » mai khoa, tai khoa, cac khoi
van hanh » van thanh, ban hanh, van anh
cau treo » cau theo, cau tren, cau triet
hieu va » lieu va, hieu qua
hai xuc » hai cuc, hai xu, chat xuc
xuc van » duc van, luc van, vuc van
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
va hai » van hai, va chai, va khai
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 sac ky nang ((ma hoi) or (mai khoi)). hieu va hai xuc van hanh vi cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang ((ma hoi) OR (mai khoi)). hieu va hai xuc van hanh vi cau treo.
• Adding a wildcard symbol may retrieve word variants: su sac ky nang ((ma hoi) or (mai khoi)). hieu va hai xuc van hanh vi cau treo*.