Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
vat doanh » van doanh, vay doanh, va doanh
cua triet » cua viet, su triet, va triet
nang doc » nang luc
thu sach » tu sach, thuat sach, thuoc sach
sach ty » sach y, sach tu, sach thu
nang co » nang cao, nang noi, nang hoc
hieu va » lieu va, hieu qua
van cua » vang cua, ban cua, dan cua
va am » va lam, va cam

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty ((nang co) OR (nang doc)) hoi. hieu va am thuc vat doanh van cua triet~".
• Adding a wildcard symbol may retrieve word variants: thu sach ty ((nang co) OR (nang doc)) hoi. hieu va am thuc vat doanh van cua triet*.