Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
doanh gia » doanh giao, doanh giai, danh gia
cua triet » cua viet, su triet, va triet
vien cac » vien bach, vien dai, vien da
duc hanh » duc thanh, duc anh, du hanh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
gia cua » gian cua, giau cua, gia cuc
nang o » nang co, nang ho, nang ro
ve cac » va cac
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang o hoi. hieu ((ve cac) or (vien cac)) duc hanh doanh gia cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang o hoi. hieu ((ve cac) OR (vien cac)) duc hanh doanh gia cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang o hoi. hieu ((ve cac) or (vien cac)) duc hanh doanh gia cua triet*.