Perhaps you should try some spelling variations:
cong thang » cong thanh, cang thang, cong thong
hien hanh » dieu hanh
trinh dan » trinh han, trinh san, trinh da
thuc hung » thuc chung, thuc nhung, thuc dung
cong than » cong thanh, cong tan, cong thai
dan thuc » dan toc, am thuc
phan cac » nhan cach, phan dau, phan lap

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien hanh - trinh dan thuc hung ((cong than) OR (cong thang)) phan cac~".
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - trinh dan thuc hung ((cong than) OR (cong thang)) phan cac*.