Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
duc danh » duc manh, duc hanh, duc dan
cau tren » cu tren, dau tren, ca tren
hieu ve » hieu va, hieu van
san cau » van cau, ban cau, can cau
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang x hoi. hieu ve cam ((duc danh) OR (duc anh)) thanh san cau tren~".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x hoi. hieu ve cam ((duc danh) OR (duc anh)) thanh san cau tren*.