Perhaps you should try some spelling variations:
doanh ban » doanh bat, doanh van, doanh nhan
ve triet » va trien, su triet
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
le va » te va, ly va, ke va

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 y nang xa hoi. lieu va cac ((le va) OR (le van)) doanh ban ((cua tre) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. lieu va cac ((le va) OR (le van)) doanh ban ((cua tre) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. lieu va cac ((le va) OR (le van)) doanh ban ((cua tre) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. lieu va cac ((le va) OR (le van)) doanh ban ((cua tre) or (ve triet))*.