Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
va doanh » van doanh, vay doanh, va danh
doanh vi » doanh va, doan vi, doanh vien
te sach » toc sach
van cac » van hac, van cau, van bac
luy tre » luyen tre
y nang » ly nang, v nang, may nang
vi luy » vi lua, vi luu
o hoi » co hoi, o hoc, o hai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (ky nang)) ((5 hoi) OR (o hoi)). hieu van cac nuoc va doanh vi luy tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) OR (ky nang)) ((5 hoi) or (o hoi)). hieu van cac nuoc va doanh vi luy tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) OR (ky nang)) ((5 hoi) or (o hoi)). hieu van cac nuoc va doanh vi luy tre*.