Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cac long » cac cong, ca long, cac dong
long van » luong van, song van, lang van
ky lang » ky dang, ky tang, tay lang
hieu ve » hieu van
hieu va » lieu va, hieu qua
van anh » van thanh, tuan anh, van minh
anh va » hanh va
va cua » va chua, via cua, ca 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: thu sach ((ky lang) OR (ky nang)) xa hoi. ((hieu ve) OR (hieu va)) cac long van anh va cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ky lang) or (ky nang)) xa hoi. ((hieu ve) OR (hieu va)) cac long van anh va cua te~".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ky lang) or (ky nang)) xa hoi. ((hieu ve) OR (hieu va)) cac long van anh va cua te*.