Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chiet tach » chieu sach
trinh cua » tinh cua, trinh luat, trinh quan
chi tach » chiu trach, chi thanh, che tac
trinh ca » trinh cau, trinh cac, trinh cam
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chi tach) or (chiet tach)) - hanh ((trinh ca) OR (trinh cua)) thuong cong dan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi tach) OR (chiet tach)) - hanh ((trinh ca) OR (trinh cua)) thuong cong dan phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chi tach) or (chiet tach)) - hanh ((trinh ca) OR (trinh cua)) thuong cong dan phan tu".
• Adding a wildcard symbol may retrieve word variants: doi ((chi tach) or (chiet tach)) - hanh ((trinh ca) OR (trinh cua)) thuong cong dan phan tu*.