Perhaps you should try some spelling variations:
chinh hien » chinh tien, chinh huyen, minh hien
hien hanh » dieu hanh
hanh dung » thanh dung, anh dung, hanh dong
hang cong » dang cong, hang nong, thanh cong
bang cong » dang cong, bang song, dung cong
dung cua » dung luan, dung cho
chan cau » can cau, chinh cau, nhanh cau
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: chinh hien hanh - hanh dung cua ((hang cong) or (bang cong)) dan ((chan cau) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chinh hien hanh - hanh dung cua ((hang cong) OR (bang cong)) dan ((chan cau) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: chinh hien hanh - hanh dung cua ((hang cong) or (bang cong)) dan ((chan cau) or (phan cau))*.