Perhaps you should try some spelling variations:
chiet tach » chieu sach
trung tuan » trung thanh, trung tam, tran tuan
trung cua » truong cua, trung cap, dung cua
dung cong » dung trong
khoan cam » khoa cam, khoan va, phan cam
ho chiet » ho chieu, ho thiet, hoc thiet
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 ((trung cua) or (trung tuan)) dung cong ty ((toan cao) or (khoan cam))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - thanh ((trung cua) OR (trung tuan)) dung cong ty ((toan cao) OR (khoan cam)).
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh ((trung cua) or (trung tuan)) dung cong ty ((toan cao) or (khoan cam))*.