Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
chieu sach » chinh sach, chiet tach, chieu sang
tranh qua » tranh cua, thanh qua, tranh quang
trinh qua » trinh quan, trinh cua, trinh quang
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh cac

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: hoc ((thieu xanh) OR (chieu sach)) - hanh ((tranh qua) OR (trinh qua)) trong cong dan than cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (chieu sach)) - hanh ((tranh qua) OR (trinh qua)) trong cong dan than cap~".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu sach)) - hanh ((tranh qua) OR (trinh qua)) trong cong dan than cap*.