Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hiem ngan » kim ngan, viem gan
hoc hiem » hoc hien, hoc thieu, hoc thiet
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 ban, toan tap

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hiem ngan - hanh trang va nhung ((cong dan) OR (cong tan)) toan cao~".
• Adding a wildcard symbol may retrieve word variants: hoc hiem ngan - hanh trang va nhung ((cong dan) OR (cong tan)) toan cao*.