Perhaps you should try some spelling variations:
trien doanh » tri doanh, lien doanh, thien danh
dung luong » dung thuong, dung phuong, dung truong
tinh quan » tinh quang, trinh quan, tin quan
tinh dung » trinh dung, tin dung, tinh quang
lien soan » bien soan, lien son, lien doanh
van hieu » cao hieu
luong va » dung va
luan » lan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( tinh quan luan van hieu qua ) or ( tinh dung luong va ((lien soan) or (trien doanh)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh quan luan van hieu qua ) OR ( tinh dung luong va ((lien soan) OR (trien doanh)) )).
• Adding a wildcard symbol may retrieve word variants: (( tinh quan luan van hieu qua ) or ( tinh dung luong va ((lien soan) or (trien doanh)) ))*.