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, 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.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thien hach - hanh tranh cua khong cong ((dan than) OR (ban than)) ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien hach - hanh tranh cua khong cong ((dan than) OR (ban than)) ban*".