Perhaps you should try some spelling variations:
doanh vang » doanh van, doanh sang, doanh quang
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
ve doanh » va doanh, de doanh, te doanh
cham cuu » cap cuu, chat cua
hieu ve » hieu va
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, dua tren
tu sach » thu sach, su sach, te sach
y nang » ky nang, ly nang, v nang
cuu ve » cuu 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. ((hieu ve) or (hieu van)) cham cuu ve doanh vang ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. ((hieu ve) OR (hieu van)) cham cuu ve doanh vang ((cua tre) OR (cua triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. ((hieu ve) or (hieu van)) cham cuu ve doanh vang ((cua tre) OR (cua triet))*".