Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, dien thanh
tien thanh » tien thinh, tran thanh, den thanh
bang huong » bang phuong, ban huong, bang tuong
bang suong » bang song, bang tuong, bang phuong
tranh cua » doanh cua, manh cua
dan toan » van toan, dan than, manh toan
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 ((hien nhanh) or (tien thanh)) - canh tranh cua ((bang huong) OR (bang suong)) dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (tien thanh)) - canh tranh cua ((bang huong) OR (bang suong)) dan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien nhanh) or (tien thanh)) - canh tranh cua ((bang huong) OR (bang suong)) dan toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) or (tien thanh)) - canh tranh cua ((bang huong) OR (bang suong)) dan toan tap*.