Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
thu sach » tu sach, thuat sach, thuoc sach
hieu va » lieu va, hieu qua
va cham » va chat, va tham
tang ma » mang may, tang van
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
ky tang » ky nang, ky dang, kho tang
hai van » thai van, ha van, hai tan
vai va » mai va, dai va, lai va
hai va » thai va, hoi va, mai va
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 ky tang ma hoa. hieu va cham xuc va hanh ((vai va) or (((hai va) OR (hai van)))) thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky tang ma hoa. hieu va cham xuc va hanh ((vai va) OR (((hai va) OR (hai van)))) thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky tang ma hoa. hieu va cham xuc va hanh ((vai va) or (((hai va) OR (hai van)))) thiet".
• Adding a wildcard symbol may retrieve word variants: thu sach ky tang ma hoa. hieu va cham xuc va hanh ((vai va) or (((hai va) OR (hai van)))) thiet*.