Perhaps you should try some spelling variations:
trinh luan » trinh luat, trinh quan, trinh han
chat duong » chat luong, chat huong, hai duong
thuen cong » thuan cong, thu cong, trien cong
nhat duong » nhat huong, nhat thuong, chat luong
van thien » van tien, van hien, van chien
cong chat » cong cua, cong ha, cong suat
van thuen » van thuyen, van thuan, van thue
cong nhat » cong nhan, cong ha, cong suat

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( cong trinh luan van thien cong chat duong ) or ( cong trinh luan van thuen cong nhat duong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( cong trinh luan van thien cong chat duong ) OR ( cong trinh luan van thuen cong nhat duong )).
• Adding a wildcard symbol may retrieve word variants: (( cong trinh luan van thien cong chat duong ) or ( cong trinh luan van thuen cong nhat duong ))*.