Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trang » thanh trung, minh trang, tinh trang
hanh trinh » hanh chinh
thong cong » trong cong, tong cong, thong thong
hoc chiet » hoc thiet, hoc nhiet, hoc hien
cua thong » cua thuong, cua khong, cua tong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan ban » van ban

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