Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh tran » hanh trang, thanh tran, thanh trang
hanh tram » hanh tam, hanh trang, thanh tran
tran dung » tran dang, tran hung, tran quang
ho chiet » ho chieu, ho thiet, hoc thiet
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chiet tach - ((hanh tran) or (hanh tram)) tran dung ((cong dan) OR (cong san)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - ((hanh tran) OR (hanh tram)) tran dung ((cong dan) OR (cong san)) toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - ((hanh tran) or (hanh tram)) tran dung ((cong dan) OR (cong san)) toan cao*".