Perhaps you should try some spelling variations:
vien nganh » vien thanh
hanh trang » thanh trung, canh tranh, hanh trinh
hoc vien » hoc hien, hoc viet, hoc tieng
trang va » tran van, hang va
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan cao » toan tap
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 vien nganh - hanh trang va thuong ((cong dan) OR (cong tan)) ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc vien nganh - hanh trang va thuong ((cong dan) OR (cong tan)) ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc vien nganh - hanh trang va thuong ((cong dan) OR (cong tan)) ((toan cao) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: hoc vien nganh - hanh trang va thuong ((cong dan) OR (cong tan)) ((toan cao) or (toan ban))*.