Perhaps you should try some spelling variations:
hien nganh » hien nhanh, hieu nganh, trien nganh
vien nganh » vien thanh
luan tuong » luan luong, luat thuong, xuan truong
tuong cong » truong cong, trong cong, tong cong
tang luan » dung luan
anh tang » anh bang, anh dang, anh nang
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan ban » can ban, chat ban, chan nan

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 nganh) OR (vien nganh)) - anh tang luan tuong cong dan chan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien nganh) OR (vien nganh)) - anh tang luan tuong cong dan chan ban*".