Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
hieu manh » chieu xanh, hieu nganh, dieu hanh
trang cua » tranh cua, tang cua, thang cua
trung cua » truong cua, trung tuan, trung cap
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu manh) OR (chieu sach)) - hanh ((trang cua) OR (trung cua)) thong cong dan than cau~".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) OR (chieu sach)) - hanh ((trang cua) OR (trung cua)) thong cong dan than cau*.