Perhaps you should try some spelling variations:
doanh vang » doanh sang, doanh quang, doan van
doanh van » doan van, doanh va, doanh ban
cham luc » cham soc, nhan luc, cham cuu
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va
y nang » ky nang, ly nang, v nang

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 luc va ((doanh vang) OR (doanh van)) cua tre~.
• 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 luc va ((doanh vang) OR (doanh van)) cua tre*.
• 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 luc va ((doanh vang) OR (doanh van)) cua tre*".