Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
theo chieu » theo tieu, ho chieu, theo chu
chieu tinh » trieu tinh, lieu tinh, chau tinh
sinh cau » trinh cau, sinh vat, sinh cua
cong dan » cong san, cong tan, huong dan
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
sinh va » sinh vat, tinh va, dinh van

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: theo chieu tinh - hanh ((sinh cau) OR (sinh va)) thuong cong dan ((toan cau) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: theo chieu tinh - hanh ((sinh cau) or (sinh va)) thuong cong dan ((toan cau) or (toan ban))*.