Perhaps you should try some spelling variations:
doanh tri » doanh tai, doanh tren, dinh tri
dien van » dien va, dien dan, dien ban
tac dung » sach dung, xay dung, tin dung
vien cac » vien bach, vien dai, vien da
den van » nen van, de van, den va
dan thi » dang thi, tran thi, dinh thi
te tac » te tai, ve tac, te cac

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 tac dung tai ) OR ( ((den van) OR (dien van)) doanh tri ))) OR ( vien cac dan thi ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( te tac dung tai ) or ( ((den van) OR (dien van)) doanh tri ))) or ( vien cac dan thi ))~".
• Adding a wildcard symbol may retrieve word variants: (((( te tac dung tai ) or ( ((den van) OR (dien van)) doanh tri ))) or ( vien cac dan thi ))*.