Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thanh tuong » thanh thuong, thanh tung, thanh huong
hien nhanh » hien hanh, tien thanh, dien thanh
tuong cua » truong cua, huong cua, thong cua
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
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 ((hien nhanh) or (thien thanh)) - thanh tuong cua dung cong ((dan than) OR (ban than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (thien thanh)) - thanh tuong cua dung cong ((dan than) OR (ban than)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien nhanh) or (thien thanh)) - thanh tuong cua dung cong ((dan than) OR (ban than)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) or (thien thanh)) - thanh tuong cua dung cong ((dan than) OR (ban than)) cao*.