Perhaps you should try some spelling variations:
luyen tre » luyen tri, huyen tren, tuyen tren
van doanh » toan doanh, van dong, van thanh
hieu van » hieu va, thien van, lieu va
doanh vi » doanh va, doan vi, doanh vien
nuoc van » nuoc va, nuoc san, luoc van
cap nuoc » dat nuoc
te sach » toc sach
van cap » van cau, van dap, van ca
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
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 v nang ((5 hoi) OR (o hoi)). hieu van cap nuoc van doanh vi ((luy tre) OR (luyen tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v nang ((5 hoi) or (o hoi)). hieu van cap nuoc van doanh vi ((luy tre) OR (luyen tre))~".
• Adding a wildcard symbol may retrieve word variants: te sach v nang ((5 hoi) or (o hoi)). hieu van cap nuoc van doanh vi ((luy tre) OR (luyen tre))*.