Perhaps you should try some spelling variations:
trinh luan » trinh luat, trinh quan, trinh toan
nhat luong » chat luong, nhat huong, nhat thuong
cong nhat » cong nhan, cong suat, dang nhat
trinh han » trinh quan
luan dan » luan danh, luan van, luat dan
ha luong » hai luong, ham luong, ha long
dan tai » van tai, dan thi, han tai
han dan » nhan dan, han danh, shan dan
cong ha » cong hoa, dong ha, cong tac

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 dan tai cong nhat luong ) or ( cong trinh han dan tai cong ha luong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( cong trinh luan dan tai cong nhat luong ) OR ( cong trinh han dan tai cong ha luong )).
• Adding a wildcard symbol may retrieve word variants: (( cong trinh luan dan tai cong nhat luong ) or ( cong trinh han dan tai cong ha luong ))*.