Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
chiet tach » chieu sach
hoc chiet » hoc thiet, hoc nhiet, hoc hien
hanh mang » nhanh mang, nhanh lang, thanh hang
cua thong » cua thuong, cua khong, cua tong
cong dan » cong san, cong tan, huong dan
cong tac » cong ty
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 mang) OR (hanh trang)) cua thong ((cong dan) or (cong tac)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - ((hanh mang) OR (hanh trang)) cua thong ((cong dan) OR (cong tac)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chiet tach - ((hanh mang) OR (hanh trang)) cua thong ((cong dan) or (cong tac)) toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - ((hanh mang) OR (hanh trang)) cua thong ((cong dan) or (cong tac)) toan ban*.