Perhaps you should try some spelling variations:
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
dang cong » dung cong
tran manh » tran minh, tran thanh, tran van
tang cua » mang cua, hang cua, tang luan
cua dang » cua cong, cua ban
cong san » cong tac
san tran » tan tran, ban tran, dang tran

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien xanh) OR (hien hanh)) - hanh tang cua dang cong san tran manh~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien hanh)) - hanh tang cua dang cong san tran manh".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien hanh)) - hanh tang cua dang cong san tran manh*.