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
van hieu » cao hieu
thi nang » thi cong, ki nang, thi hanh
khien so » khien mo, khien hoc, khien cho
hien so » bien so, hieu so, khien mo
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) OR (khien 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) OR (khien so)) )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tinh dung luan van hieu soat ) or ( thi nang quan thoi ((hien so) OR (khien so)) ))".
• Adding a wildcard symbol may retrieve word variants: (( tinh dung luan van hieu soat ) or ( thi nang quan thoi ((hien so) OR (khien so)) ))*.