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 thanh » ban thanh, van tuan
dap dung » ap dung, dan dung, dap ung
van than » van thang, van tuan, van phan

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 than) OR (van thanh)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "mot chieu sach - hanh trinh dap dung cong ((van than) OR (van thanh)) cau*".