Perhaps you should try some spelling variations:
thieu hang » thieu khang, thieu quang, thi hang
cua triet » cua viet, su triet, va triet
nhan thuc » nhan luc, dan thuc, toan thuc
danh dai » danh dau, danh sai, vanh dai
hieu ve » hieu va, hieu van
ve nhan » ve nha, de nhan, va nhan
thuc va » thuc vat, thuc dan, thuc day
danh di » danh du, xanh di, danh dien
tu sach » thu sach, su sach, te sach
co hoi » co hoc, co loi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach thieu hang ((co hoi) or (xa hoi)). hieu ve nhan thuc va ((danh dai) OR (danh di)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thieu hang ((co hoi) OR (xa hoi)). hieu ve nhan thuc va ((danh dai) OR (danh di)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thieu hang ((co hoi) or (xa hoi)). hieu ve nhan thuc va ((danh dai) OR (danh di)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach thieu hang ((co hoi) or (xa hoi)). hieu ve nhan thuc va ((danh dai) OR (danh di)) cua triet*.