Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
tran thanh » ban thanh, van thanh, quan thanh
tran tuan » tranh luan, tran van, van tuan
tran xuan » tran van
dong cong » duong cong, dung cong, dang cong
cong tan » cong tac, cong san, cong thanh

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: theo chieu sach - thanh ((((tran tuan) OR (tran quang))) OR (tran xuan)) dong cong tan tran thanh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - thanh ((((tran tuan) OR (tran quang))) or (tran xuan)) dong cong tan tran thanh~".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh ((((tran tuan) OR (tran quang))) or (tran xuan)) dong cong tan tran thanh*.