Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
trinh cua » tinh cua, trinh luat, trinh quan
chi tach » chiu trach, chiet tach, chi thanh
trinh ca » trinh cau, trinh cac, trinh cam
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
phan cau » phan dau, phan cac, phan tu
doi chi » doi khi

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 - hanh ((trinh ca) OR (trinh cua)) thuong cong tan phan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi tach - hanh ((trinh ca) OR (trinh cua)) thuong cong tan phan cau".
• Adding a wildcard symbol may retrieve word variants: doi chi tach - hanh ((trinh ca) OR (trinh cua)) thuong cong tan phan cau*.