Perhaps you should try some spelling variations:
doanh luan » doanh nhan
thu sach » tu sach, thuat sach, thuoc sach
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va

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

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