Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hien nhanh » hien hanh, tien thanh, dien thanh
dan thanh » dang thanh, danh thanh, ban thanh
thanh chu » thanh chau, thanh cha, thanh thu
cua hang » cua dang, cua nhung, cua cong
cong dan » cong san, cong tan, huong dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien nhanh) OR (thien thanh)) - canh tranh ((cua hang) or (cua ban)) cong dan thanh chu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (thien thanh)) - canh tranh ((cua hang) OR (cua ban)) cong dan thanh chu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien nhanh) OR (thien thanh)) - canh tranh ((cua hang) or (cua ban)) cong dan thanh chu".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) OR (thien thanh)) - canh tranh ((cua hang) or (cua ban)) cong dan thanh chu*.