Perhaps you should try some spelling variations:
nghien tach » nghiep cach, nghiep sach, nghiem sach
thanh trung » thanh tung
hoc nghien » hoc hien
cua thuong » cua truong, cua phuong, ca thuong
cua thong » cua khong, cua tong, suat thong
cong tran » cong tan, cong tuan, cong toan
tran van » luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc nghien tach - thanh trung ((cua thong) or (cua thuong)) cong tran van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nghien tach - thanh trung ((cua thong) OR (cua thuong)) cong tran van ban.
• Adding a wildcard symbol may retrieve word variants: hoc nghien tach - thanh trung ((cua thong) or (cua thuong)) cong tran van ban*.