Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
mai khoi » mai khoa, tai khoa, cac khoi
cham xuc » cam xuc, chat xuc, cham soc
hieu vu » hieu va, hieu ve, hieu su
mai hoi » dai hoi, lai hoi, mai doi
va danh » va dinh, va dan, va hanh
vai cau » va cau, vai cac, lai chau
van cau » van dau, van hau, van chat
vu cham » va cham, vu kham, tu cham
y nang » ky nang, ly nang, v nang
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: thu sach y nang ((mai hoi) or (mai khoi)). hieu vu cham xuc va danh ((vai cau) OR (van cau)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang ((mai hoi) OR (mai khoi)). hieu vu cham xuc va danh ((vai cau) OR (van cau)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang ((mai hoi) or (mai khoi)). hieu vu cham xuc va danh ((vai cau) OR (van cau)) tren".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ((mai hoi) or (mai khoi)). hieu vu cham xuc va danh ((vai cau) OR (van cau)) tren*.