Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
dang xay » dang van, van xay
so hanh » so sanh, so danh, co hanh
cac duc » cac du, cao duc, cac dac
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
duc van » duc va, duc tan, duc manh
hieu ve » hieu va, hieu van
hanh ky » hanh kem
lang xa » lang ha, lang van
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: so hanh ky ((lang xa) OR (dang xay)) hoi. hieu ve cac duc van hanh ((vai cua) OR (lai cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so hanh ky ((lang xa) or (dang xay)) hoi. hieu ve cac duc van hanh ((vai cua) OR (lai cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: so hanh ky ((lang xa) or (dang xay)) hoi. hieu ve cac duc van hanh ((vai cua) OR (lai cua)) tre*.