Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
mai khoa » tai khoa, may khoa, dai khoa
vai cac » va cac, tai cac, voi cac
vai cau » va cau, van cau, lai chau
va danh » va dinh, va dan, va hanh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ky sang » ky nang, ky dang, ky tang
ve cham » va cham, ve chat, vu cham
xuc va » duc va, tuc va, luc 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 sang ((mai hoi) or (mai khoa)). hieu ve cham xuc va danh ((vai cau) or (vai cac)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang ((mai hoi) OR (mai khoa)). hieu ve cham xuc va danh ((vai cau) OR (vai cac)) tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang ((mai hoi) or (mai khoa)). hieu ve cham xuc va danh ((vai cau) or (vai cac)) tren*.