Perhaps you should try some spelling variations:
chiet tach » chieu sach
hoang manh » hoang minh, hoang anh, hoang xanh
cua thuong » cua truong, cua phuong, ca thuong
hoc chiet » hoc thiet, hoc nhiet, hoc hien
cua thong » cua khong, cua tong, suat thong
cong san » cong tac
san van » tan van, luan van, tran 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 chiet tach - hoang manh ((cua thong) or (cua thuong)) cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - hoang manh ((cua thong) OR (cua thuong)) cong san van ban*.