Perhaps you should try some spelling variations:
hien nganh » hien nhanh, hieu nganh, trien nganh
vien nganh » vien thanh
tuong cong » truong cong, tong cong, luong cong
tang luan » dung luan
anh tang » anh bang, anh dang, anh nang
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) OR (trong cong)) dan chan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nganh) OR (vien nganh)) - anh tang luan ((tuong cong) OR (trong 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) OR (trong cong)) dan chan ban*".