Perhaps you should try some spelling variations:
dau tieng » dau tien, cau tieng, day tieng
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
cac thu » cach thuc, cac thoi
thu van » thuc van, thuy van, tu van
vai dau » va dau, van dau, xvii dau
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
ve cac » va cac, vien cac

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: tu san ky ((mang may) OR (nang ma)) hoi. hieu ve cac thu van hanh vai dau tieng~.
• Adding a wildcard symbol may retrieve word variants: tu san ky ((mang may) or (nang ma)) hoi. hieu ve cac thu van hanh vai dau tieng*.