Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, phong chong
hoc chiet » hoc thiet, hoc nhiet, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
van than » van thanh, van thang, van tuan
than ban » thanh ban, toan ban, than man

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chiet tach - hanh trinh cua ((thong cong) OR (thong thong)) van than ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chiet tach - hanh trinh cua ((thong cong) OR (thong thong)) van than ban".
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - hanh trinh cua ((thong cong) OR (thong thong)) van than ban*.