Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
van trang » vang trang, van thang, va trang
dang toan » dan toan, dung toan, dang thanh
dang tran » dang thanh, quang tran, hoang tran
ho chiet » ho chieu, ho thiet, hoc thiet

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 trinh cua nhung cong ((van trang) or (((dang toan) OR (dang tran)))) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh trinh cua nhung cong ((van trang) OR (((dang toan) OR (dang tran)))) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - hanh trinh cua nhung cong ((van trang) or (((dang toan) OR (dang tran)))) cau".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh trinh cua nhung cong ((van trang) or (((dang toan) OR (dang tran)))) cau*.