Perhaps you should try some spelling variations:
trinh luan » trinh luat, trinh han, trinh toan
trinh quan » tinh quang, trinh luat, trinh han
nhat luong » chat luong, nhat huong, nhat thuong
bang cong » dang cong, bang song, hang cong
cong nhat » cong nhan, cong ha, cong suat
van bang » van ban, van nang, von bang

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