Perhaps you should try some spelling variations:
vay doanh » van doanh, ly doanh, voi doanh
doanh co » doanh cua, doanh va, anh co
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
xuc vay » xuc hay
cua tre » cua te, cuu tre, cua triet
dang ha » dong ha, dung ha, lang ha
ky dang » ky nang, ky danh
ha hoi » hoa hoi, ha noi, xa hoi
co cua » con cua, ca cua, cong cua

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 dang ha hoi. ((((hieu va) OR (hieu qua))) OR (lieu va)) cam xuc vay doanh co cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang ha hoi. ((((hieu va) OR (hieu qua))) or (lieu va)) cam xuc vay doanh co cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang ha hoi. ((((hieu va) OR (hieu qua))) or (lieu va)) cam xuc vay doanh co cua tre*.