Perhaps you should try some spelling variations:
doanh cua » doanh luan
van doanh » toan doanh, van dong, van thanh
thu sach » tu sach, thuat sach, thuoc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cac duc » cac du, cao duc, cac dac
duc van » duc va, duc tan, duc manh
cua cua » cua chua, ca cua, qua cua
cua te » cua tu

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 x) or (nang cao)) hoi. hieu va cac duc van doanh cua cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((nang x) OR (nang cao)) hoi. hieu va cac duc van doanh cua cua te.
• Adding a wildcard symbol may retrieve word variants: thu sach ky ((nang x) or (nang cao)) hoi. hieu va cac duc van doanh cua cua te*.