Perhaps you should try some spelling variations:
mai khoi » mai khoa, tai khoa, cac khoi
chat xuc » chat huu, cam xuc, chao xu
hanh hai » thanh hai, nhanh hai, hang hai
va thieu » va thiet, va hieu, va tieu
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
mai hoi » dai hoi, lai hoi, mai doi
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
va hanh » van hanh, va thanh, va danh
xuc va » duc va, tuc va, luc va
hai va » hai van, thai va, hoi va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang ((mai hoi) or (mai khoi)). hieu ve chat xuc va hanh hai va thieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((mai hoi) OR (mai khoi)). hieu ve chat xuc va hanh hai va thieu.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((mai hoi) or (mai khoi)). hieu ve chat xuc va hanh hai va thieu*.