Perhaps you should try some spelling variations:
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
sach ky » sac ky, sach y, sach ty
luy tre » luyen tre
so hai » son hai, su hai, so ha
vi luy » vi lua, vi luu
5 hoi » o hoi
o hai » co hai, o lai, _ 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 ky nang ((5 hoi) OR (((o hai) OR (so hai)))). lieu va cac nuoc va doanh vi luy tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((5 hoi) or (((o hai) OR (so hai)))). lieu va cac nuoc va doanh vi luy tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((5 hoi) or (((o hai) OR (so hai)))). lieu va cac nuoc va doanh vi luy tre*.