Perhaps you should try some spelling variations:
doanh gia » doanh giao, doanh giai, danh gia
van doanh » toan doanh, van dong, van thanh
cau tren » cu tren, dau tren, ca tren
thu sach » tu sach, thuat sach, thuoc sach
cac duc » cac du, cao duc, cac nuoc
gia cau » giua cau, giay cau, gia cam
cac dac » cac dan, cac dai, cac bac
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
nang o » nang co, nang ho, nang ro
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: ((su sach) or (thu sach)) ky nang o hoi. hieu ve ((cac duc) or (cac dac)) van doanh gia cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thu sach)) ky nang o hoi. hieu ve ((cac duc) OR (cac dac)) van doanh gia cau tren.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thu sach)) ky nang o hoi. hieu ve ((cac duc) or (cac dac)) van doanh gia cau tren*.