Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
van hanh » van thanh, ban hanh, van anh
so sach » so sanh, bo sach, co sach
va danh » va dinh, va dan, dia danh
va hanh » va thanh, ban hanh, dao hanh
su viet » so viet
sach ky » sac ky, sach y, sach ty
va cham » va chat, va tham
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
vi su » va su, ve su, ki su

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

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