Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hanh tranh » canh tranh, hanh trinh, hanh trang
khong cong » thong cong, khong cang, chong cong
hoc thien » hoc hien, hoc thieu, hoc thiet
tranh cua » doanh cua, manh cua
cua khong » hua khong, cua phuong, cua thuong
dan than » dan chan, ban than, van than
ban hang » ngan 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 thien hach - hanh tranh cua khong cong ((dan than) or (ban hang)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - hanh tranh cua khong cong ((dan than) OR (ban hang)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - hanh tranh cua khong cong ((dan than) or (ban hang)) ban*.