Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
xuc van » duc van, luc van, xuc ban
qua cac » cua cac
nang xa » nang x, lang xa, nang ma
qua ca » qua cua, qua cai, quan cau
ve cuu » ve chu, ve cua, ve cum
ve cau » ke cau, va cau, ve 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 sach ky nang xa hoi. hieu ((qua cac) OR (qua ca)) xuc van hanh ((ve cuu) OR (ve cau)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu ((qua cac) or (qua ca)) xuc van hanh ((ve cuu) OR (ve cau)) tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu ((qua cac) or (qua ca)) xuc van hanh ((ve cuu) OR (ve cau)) tre*.