Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh toan » tinh toan, thanh toan, trinh han
dang cong » dung cong
van khang » van khanh, van thanh, van quang
ho chieu » theo chieu, hoc thieu, doi chieu
trinh va » trinh van, trinh vat, trinh ve
van hang » van hoang, van thang, ban hang

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 chieu sach - canh ((trinh toan) OR (trinh va)) dang cong ((van hang) OR (van khang)) tai~.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - canh ((trinh toan) or (trinh va)) dang cong ((van hang) or (van khang)) tai*.