Perhaps you should try some spelling variations:
hien manh » hien hanh, hieu manh, hien nhanh
tien manh » tien anh, tien thanh, tieng anh
canh tinh » hanh tinh, manh tinh, canh tranh
dang cong » dung cong
dan phan » doan phan, dan chan, van phan
phan cau » phan dau, phan cac, phan tu
tinh va » tich va, trinh van, trinh vat

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 ((hien manh) OR (tien manh)) - canh tinh va ((thanh cong) OR (dang cong)) dan phan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien manh) OR (tien manh)) - canh tinh va ((thanh cong) or (dang cong)) dan phan cau~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien manh) OR (tien manh)) - canh tinh va ((thanh cong) or (dang cong)) dan phan cau*.