Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhiet tach » chiet tach
cua thuong » cua truong, cua phuong, ca thuong
hoc nhiet » hoc thiet, hoc nghien, hoc hien
cua thong » cua khong, cua tong, suat thong
cong tan » cong tac, cong san, cong thanh
tan van » tran van, tang 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 nhiet tach - thanh trung ((cua thong) OR (cua thuong)) cong tan van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc nhiet tach - thanh trung ((cua thong) OR (cua thuong)) cong tan van ban".
• Adding a wildcard symbol may retrieve word variants: hoc nhiet tach - thanh trung ((cua thong) OR (cua thuong)) cong tan van ban*.