Perhaps you should try some spelling variations:
trinh luan » trinh luat, trinh han, trinh toan
trinh xuat » trinh luat, trinh xuan, trich xuat
trinh quan » tinh quang, trinh luat, trinh han
cong chat » cong nhat, cong cua, cong ha
dinh thi » dinh tri
van thi » van tai, dan thi, van thu
luong » huong, duong

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