Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chieu xanh » chieu sach, chieu sang, chieu tinh
hoc chieu » hoc thieu, ho chieu, hoc hien
trinh cua » trinh luat, trinh quan, trinh luan
tinh cua » sinh cua, tinh chat, tranh cua
cong dan » cong san, cong tan, huong dan
khan cap » khan ap, than cap, khoan cam
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu xanh - hanh ((trinh cua) OR (tinh cua)) thuong cong dan ((khan cap) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh ((trinh cua) OR (tinh cua)) thuong cong dan ((khan cap) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu xanh - hanh ((trinh cua) OR (tinh cua)) thuong cong dan ((khan cap) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh ((trinh cua) OR (tinh cua)) thuong cong dan ((khan cap) or (toan tap))*.