Perhaps you should try some spelling variations:
thanh va » thanh van, hanh va, thanh ha
vu sach » vu bach, su sach, vu khach
hieu ve » hieu va, hieu van
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
cua tre » cua te, cuu tre, cua triet
ve cac » va cac, vien cac
luc va » duc va, tuc va
loc va » hoc va
va cua » va chua, via cua, ca cua

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: vu sach ((ky lang) OR (ky dang)) xa hoi. hieu ve cac ((luc va) OR (loc va)) thanh va cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ky lang) OR (ky dang)) xa hoi. hieu ve cac ((luc va) or (loc va)) thanh va cua tre~".
• Adding a wildcard symbol may retrieve word variants: vu sach ((ky lang) OR (ky dang)) xa hoi. hieu ve cac ((luc va) or (loc va)) thanh va cua tre*.