Perhaps you should try some spelling variations:
chiet tach » chieu sach
doi chiet » doi chieu, doi chi, doi viet
tran tuan » tran xuan, tran thanh, tranh luan
tong cong » trong cong, cong cong, dung cong
cong tac » cong ty
tac ran » tac can, tac van, tac quan
ran cau » van cau, ban cau, can cau

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 ((tran tuan) or (tran quang)) tong cong tac ran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chiet tach - hanh ((tran tuan) OR (tran quang)) tong cong tac ran cau.
• Adding a wildcard symbol may retrieve word variants: doi chiet tach - hanh ((tran tuan) or (tran quang)) tong cong tac ran cau*.