Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
canh trinh » canh tranh, hanh trinh, canh tinh
quan nhan » xuan nhan, quan nha, luan nhan
cong toan » cong tan, cong hoan, cong tuan
toan phan » thanh phan, toan ban, hoa phan
van nhan » van phan, van thanh, danh nhan
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - canh trinh ((quan nhan) or (van nhan)) cong toan phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - canh trinh ((quan nhan) OR (van nhan)) cong toan phan cac.
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - canh trinh ((quan nhan) or (van nhan)) cong toan phan cac*.