Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chieu xanh » chieu sach, chieu sang, chieu tinh
doi chieu » doc hieu, doi chi, ho chieu
chinh cua » chinh sua, hinh cua, chinh luan
chinh ca » chinh ta, chinh va, chinh tai
cong dan » cong san, cong tan, huong dan
toan cao » toan ban, toan tap
khan ap » khan cap, han ap, khan dam

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: doi chieu xanh - hanh ((chinh cua) OR (chinh ca)) thuong cong dan ((khan ap) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - hanh ((chinh cua) OR (chinh ca)) thuong cong dan ((khan ap) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - hanh ((chinh cua) OR (chinh ca)) thuong cong dan ((khan ap) or (toan cao))*.