Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, nhung don
hoc thien » hoc hien, hoc thieu, hoc thiet
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, bang cong
ban nhan » ban than, van nhan, ban thanh

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

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