Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
thanh va » thanh van, hanh va, thanh ha
vu sach » vu bach, su sach, vu khach
ky lang » ky nang, ky tang, tay lang
ky dang » ky nang, ky danh
hieu ve » hieu va, hieu van
cac loc » cac lop, cac toc, cac hoc
cua tre » cua te, cuu tre, cua triet
loc va » hoc va, luc 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) OR (lieu va)) cac 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) or (lieu va)) cac 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) or (lieu va)) cac loc va thanh va cua tre*.