Perhaps you should try some spelling variations:
trinh luan » trinh luat, trinh quan, trinh han
suat duong » xuat duong, suat huong, suat thong
luan cong » luat cong, luong cong, luan chung
suat dung » thuat dung, xuat duong, suat huong
cong tai » cong thai, cong tac, dong tai
tai nang » thi nang, tai lang, dai nang

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "cong trinh luan cong tai nang ((suat duong) OR (suat dung))~".
• Adding a wildcard symbol may retrieve word variants: cong trinh luan cong tai nang ((suat duong) OR (suat dung))*.