Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hanh tranh » canh tranh, hanh trinh, hanh trang
thong cong » trong cong, tong cong, thong thong
hoc thien » hoc hien, hoc thieu, hoc thiet
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
dan than » dan chan, van than, dan toan
ban than » ban thanh, van thanh, ban hang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - hanh tranh cua thong cong ((xuan toan) OR (((dan than) OR (ban than)))) ban~.
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - hanh tranh cua thong cong ((xuan toan) or (((dan than) or (ban than)))) ban*.