Perhaps you should try some spelling variations:
chiet tach » chieu sach
trinh quan » tinh quang, trinh luat, trinh han
trinh cua » tinh cua, trinh luat, trinh luan
cong cong » cong dong, trong cong, dung cong
ho chiet » ho chieu, ho thiet, hoc thiet
cong tac » cong ty
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh ((trinh cua) OR (trinh quan)) cong cong tac ((toan cau) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - hanh ((trinh cua) OR (trinh quan)) cong cong tac ((toan cau) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh ((trinh cua) OR (trinh quan)) cong cong tac ((toan cau) or (toan cao))*.