Perhaps you should try some spelling variations:
tinh dung » trinh dung, tin dung, tinh quang
hieu soat » hieu suat, hieu hoat, hieu luat
nang quan » ban quan, nang suat
quan thoi » quang thoai, quang thai, quan tri
thoi hien » thi hien, thoi mien, hoc hien
van hieu » cao hieu
thi nang » thi cong, ki nang, thi hanh
hien so » khien so, bien so, hieu so
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 dung luan van hieu soat ) or ( thi nang quan thoi hien so ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung luan van hieu soat ) OR ( thi nang quan thoi hien so )).
• Adding a wildcard symbol may retrieve word variants: (( tinh dung luan van hieu soat ) or ( thi nang quan thoi hien so ))*.