Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
trinh dap » trinh lap, trinh da, trinh dan
dung cong » dung trong
van tuanh » van thanh, van tranh, van quan
dap dung » ap dung, dan dung, dap ung
van tuan » van quan, van ban, anh tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: mot chieu sach - hanh trinh dap dung cong ((van tuan) or (van tuanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: mot chieu sach - hanh trinh dap dung cong ((van tuan) OR (van tuanh)) cau*.