Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
chi thanh » chi nhanh, thi thanh, cho thanh
trinh cac » trinh cau, trinh chat, trinh chao
chi tach » chiu trach, chiet tach, che tac
trinh ca » trinh cau, trinh cua, trinh cam
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
phan cac » nhan cach, phan dau, phan lap

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