Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
hien hanh » dieu hanh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
hang cong » dang cong, hang nong, bang cong
van than » van thanh, van thang, van phan
van tuan » van quan, van ban, anh tuan
tinh va » tich va, trinh van, trinh vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien hanh - hanh tinh va ((nhung cong) or (hang cong)) ((van than) or (van tuan)) cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - hanh tinh va ((nhung cong) OR (hang cong)) ((van than) OR (van tuan)) cap.
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - hanh tinh va ((nhung cong) or (hang cong)) ((van than) or (van tuan)) cap*.