Perhaps you should try some spelling variations:
cong chuc » cong thuc, cong cu, cong cua
dung cong » dung trong
chi xanh » chi anh, chi danh, chi hanh
cong suc » cong thuc, cong suat, cong tac
cong tam » cong tac, cong tan, cong nam
doi chi » doi khi
tam van » nam van, dam van, tom van

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 xanh - thanh ((cong suc) OR (cong chuc)) dung cong tam van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi xanh - thanh ((cong suc) OR (cong chuc)) dung cong tam van ban".
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - thanh ((cong suc) OR (cong chuc)) dung cong tam van ban*.