Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
trinh cac » trinh cau, trinh chat, trinh chao
chi tach » chiu trach, chiet tach, chi thanh
trinh ca » trinh cau, trinh cua, trinh cam
cong tan » cong tac, cong san, cong thanh
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu, hang dau
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 cac)) thuong cong tan ((phan cau) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi tach - hanh ((trinh ca) OR (trinh cac)) thuong cong tan ((phan cau) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: doi chi tach - hanh ((trinh ca) or (trinh cac)) thuong cong tan ((phan cau) or (phan dau))*.