Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hanh tranh » hanh trinh, hanh trang, lanh tranh
hoc thien » hoc hien, hoc thieu, hoc thiet
cua hang » cua dang, cua nhung, cua ban
cong tan » cong tac, cong san, cong thanh
tan doan » tran doan, tap doan, van doan
doan cap » doanh cao, dan ca, toan cao

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) OR (canh tranh)) ((cua hang) OR (cua cong)) cong tan doan cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien hach - ((hanh tranh) or (canh tranh)) ((cua hang) OR (cua cong)) cong tan doan cap~".
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - ((hanh tranh) or (canh tranh)) ((cua hang) OR (cua cong)) cong tan doan cap*.