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
tang luan » dung luan
van cong » van dong, van phong, phan cong
cong san » cong tac
san phan » san pham, van phan, sat phan
phan cac » nhan cach, phan dau, phan lap

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 luan van cong san phan cac~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien hanh)) - hanh tang luan van cong san phan cac".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien hanh)) - hanh tang luan van cong san phan cac*.