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, va trang, van trung
van thang » van thanh, van khang, van hang
dang toan » dang tran, dan toan, dung toan
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 (van thang))) or (dang toan)) 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 (van thang))) OR (dang toan)) 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 (van thang))) or (dang toan)) cau".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh trinh cua nhung cong ((((van trang) OR (van thang))) or (dang toan)) cau*.