Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
hoc tien » hoc tieng, hoc hien, hoc vien
tien anh » tieng anh, tien manh, dien anh
phap » phan, pham

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc tien anh - hanh trinh cua ((hang cong) or (dang cong)) van ban phap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tien anh - hanh trinh cua ((hang cong) OR (dang cong)) van ban phap.
• Adding a wildcard symbol may retrieve word variants: hoc tien anh - hanh trinh cua ((hang cong) or (dang cong)) van ban phap*.