Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
ma hoi » mai hoi, ma hoa, me hoi
xuc va » duc va, tuc va, luc va
tai va » thai va, mai va, dai va
thiet » thieu

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 ((ma hoi) OR (xa hoi)). hieu ve cham xuc va hanh ((tai va) or (tri va)) thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((ma hoi) OR (xa hoi)). hieu ve cham xuc va hanh ((tai va) OR (tri va)) thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang ((ma hoi) OR (xa hoi)). hieu ve cham xuc va hanh ((tai va) or (tri va)) thiet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((ma hoi) OR (xa hoi)). hieu ve cham xuc va hanh ((tai va) or (tri va)) thiet*.