Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
vu sach » vu bach, su sach, vu khach
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
hieu ve » hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ky sang » ky nang, ky dang, ky tang
ma hoi » xa hoi, ma hoa, me hoi
cua te » cua tu

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: vu sach ky sang ((ma hoi) OR (mai hoi)). ((hieu ve) OR (hieu va)) cam duc va hanh vai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky sang ((ma hoi) OR (mai hoi)). ((hieu ve) or (hieu va)) cam duc va hanh vai cua te~".
• Adding a wildcard symbol may retrieve word variants: vu sach ky sang ((ma hoi) OR (mai hoi)). ((hieu ve) or (hieu va)) cam duc va hanh vai cua te*.