Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
xang xa » lang xa, mang xa, ang xa
tuc van » thuc van, truc van, tuc va
va cam » va cham, va cao, va cai
ve cac » vien cac
vi cua » vai cua, di cua
cua te » cua tu

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 sach ty xang xa hoi. hieu ((((va cam) OR (va cac))) OR (ve cac)) tuc van hanh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty xang xa hoi. hieu ((((va cam) OR (va cac))) or (ve cac)) tuc van hanh vi cua te~".
• Adding a wildcard symbol may retrieve word variants: tu sach ty xang xa hoi. hieu ((((va cam) OR (va cac))) or (ve cac)) tuc van hanh vi cua te*.