Perhaps you should try some spelling variations:
cac thiet » cach thiet, cad thiet, cam thiet
cham xuc » cam xuc, chat xuc, cham soc
van hanh » van thanh, ban hanh, van anh
va thanh » gia thanh, ban thanh, va tinh
va hanh » va danh, ban hanh, dao hanh
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
ma hoi » mai hoi, xa hoi, ma hoa
vi cac » voi cac, vai cac, va cac

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