Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
can thiet » dan thiet, cac thiet, cad thiet
va thanh » gia thanh, ban thanh, va tinh
van hanh » van thanh, ban hanh, van anh
sach ky » sac ky, sach y, sach ty
hieu tu » chieu tu, hieu tuc, hien tu
tu cham » toc cham, thi cham
ma hoi » mai hoi, ma hoa, me hoi
vi can » voi can, vi van, i can

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

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