Perhaps you should try some spelling variations:
sang lap » sang tao, sang ma, sang tai
hieu van » hieu va, thien van, lieu va
su sach » so sach
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va
lap hai » lap tai, lap lai, lap hoat
ky sang » ky nang, ky dang, ky tang
vu sach » vu bach, vu khach
vi cua » vai cua, di cua
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: ((su sach) OR (vu sach)) ky sang lap hai. ((hieu ve) OR (hieu van)) cam duc va danh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ky sang lap hai. ((hieu ve) OR (hieu van)) cam duc va danh vi cua te~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky sang lap hai. ((hieu ve) OR (hieu van)) cam duc va danh vi cua te*.