Perhaps you should try some spelling variations:
chiet tach » chieu sach
quan nhung » qua nhung, cua nhung, luan chung
nhung cong » dung cong, thong cong, hang cong
cong quan » cuong quan, cong quang, tong quan
ho chiet » ho chieu, ho thiet, hoc thiet
cong tac » cong ty
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu

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 cong quan nhung cong tac ((than cau) OR (phan cau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - thanh cong quan nhung cong tac ((than cau) OR (phan cau))".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh cong quan nhung cong tac ((than cau) OR (phan cau))*.