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

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

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