Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
su viet » so viet
va dinh » van dinh, va kinh, va tinh
va hanh » van hanh, va thanh, va danh
va cham » va chat, va tham
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
so sach » so sanh, bo sach, co sach
ma hoi » mai hoi, xa hoi, ma hoa
so sac » so dac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sac) OR (so sach)) ky tang ma hoi. hieu va cham xuc ((va hanh) or (va dinh)) va su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sac) OR (so sach)) ky tang ma hoi. hieu va cham xuc ((va hanh) OR (va dinh)) va su viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sac) OR (so sach)) ky tang ma hoi. hieu va cham xuc ((va hanh) or (va dinh)) va su viet".
• Adding a wildcard symbol may retrieve word variants: ((so sac) OR (so sach)) ky tang ma hoi. hieu va cham xuc ((va hanh) or (va dinh)) va su viet*.