Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
tinh dung » trinh dung, tin dung, tinh quang
dung nhan » dung luan
hieu soat » hieu suat, hieu hoat, hieu luat
bien soan » bien so
nhan van » nhan dan, nhan va, phan van
van hieu » cao hieu
luan va » luan van, luat va
quan vi » quan li, quan tri, quan doi

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

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