Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
cong bang » cuong bang, hong bang, cong lang
dong bang » dong san
va trong » va truong, va thong, va tuong
khan cap » khan ap, than cap, khoan cam
tung va » trung va, tuong va, dung va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (chieu sach)) - thanh tung va trong ((cong bang) OR (dong bang)) khan cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu manh) or (chieu sach)) - thanh tung va trong ((cong bang) OR (dong bang)) khan cap~".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chieu sach)) - thanh tung va trong ((cong bang) OR (dong bang)) khan cap*.