Perhaps you should try some spelling variations:
hien thanh » thien thanh, hien hanh, tien thanh
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong vang » cong lang, cong quang, cong ngang
cong van » cong san, song van, cong tan
ban nha » ban nhan, ban than, van nhan
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 hien thanh - hanh tranh cua nhung ((cong van) or (cong vang)) ((ban nha) OR (ban phap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien thanh - hanh tranh cua nhung ((cong van) OR (cong vang)) ((ban nha) OR (ban phap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien thanh - hanh tranh cua nhung ((cong van) or (cong vang)) ((ban nha) OR (ban phap))".
• Adding a wildcard symbol may retrieve word variants: hoc hien thanh - hanh tranh cua nhung ((cong van) or (cong vang)) ((ban nha) OR (ban phap))*.