Perhaps you should try some spelling variations:
chiet tach » chieu sach
trung tuan » trung thanh, trung tam, tran tuan
nong cong » cong cong, tong cong, nang cong
ho chiet » ho chieu, ho thiet, hoc thiet
dung cua » dung luan, dung cho
cong san » cong tac
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.

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