Perhaps you should try some spelling variations:
van thiet » va thiet, dan thiet, can thiet
cham xuc » cam xuc, chat xuc, pham duc
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa

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

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