Perhaps you should try some spelling variations:
thien thanh » thi thanh, hien hanh, chien tranh
tien thanh » tien thinh, tran thanh, den thanh
cong thanh » dong thanh, cong trinh, cong tan
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong manh » cong danh, duong manh, hoang manh
toan tap » toan ban

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 thanh) OR (tien thanh)) - canh tranh cua nhung ((cong manh) or (cong thanh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien thanh) OR (tien thanh)) - canh tranh cua nhung ((cong manh) OR (cong thanh)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien thanh) OR (tien thanh)) - canh tranh cua nhung ((cong manh) or (cong thanh)) toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien thanh) OR (tien thanh)) - canh tranh cua nhung ((cong manh) or (cong thanh)) toan tap*.