Perhaps you should try some spelling variations:
sang lap » sang tao, sang ma, sang tai
danh vai » danh sai, danh va, doanh van
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
hieu ve » hieu van
lap hai » lap tai, lap lai, lap hoat
ky sang » ky nang, ky dang, ky tang
tuc va » thuc va, truc va, duc va
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 ky sang lap hai. ((hieu ve) OR (hieu va)) cam ((tuc va) OR (tuc xa)) danh vai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky sang lap hai. ((hieu ve) or (hieu va)) cam ((tuc va) OR (tuc xa)) danh vai cua te~".
• Adding a wildcard symbol may retrieve word variants: su sach ky sang lap hai. ((hieu ve) or (hieu va)) cam ((tuc va) OR (tuc xa)) danh vai cua te*.