Perhaps you should try some spelling variations:
doanh co » doanh cua, doanh va, anh co
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
co cua » con cua, ca cua, cong cua
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky ((nang xa) or (nang ma)) hoi. hieu ve cac ((xuc va) or (luc va)) doanh co cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang xa) OR (nang ma)) hoi. hieu ve cac ((xuc va) OR (luc va)) doanh co cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang xa) or (nang ma)) hoi. hieu ve cac ((xuc va) or (luc va)) doanh co cua tre*.