Perhaps you should try some spelling variations:
chiet tach » chieu sach
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
ho chiet » ho chieu, ho thiet, hoc thiet
cong van » cong vang, cong san, song van
than cau » phan cau, than cap, thanh chau
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chiet tach - ((thanh tung) or (thanh cong)) cua nhung cong van ((than cau) OR (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - ((thanh tung) OR (thanh cong)) cua nhung cong van ((than cau) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - ((thanh tung) or (thanh cong)) cua nhung cong van ((than cau) OR (toan cau))".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - ((thanh tung) or (thanh cong)) cua nhung cong van ((than cau) OR (toan cau))*.