Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
doi chiet » doi chieu, doi chi, doi viet
trinh cua » tinh cua, trinh luat, trinh quan
ban cong » bang cong, van cong, phan cong
tan toan » tan tran, tap toan, dan toan
van toan » van tuan, van tan, van thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chiet tach - hanh trinh cua ban cong ((tan toan) OR (van toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chiet tach - hanh trinh cua ban cong ((tan toan) OR (van toan)) cau".
• Adding a wildcard symbol may retrieve word variants: doi chiet tach - hanh trinh cua ban cong ((tan toan) OR (van toan)) cau*.