Perhaps you should try some spelling variations:
duc manh » suc manh, duc anh, duc minh
duc danh » duc anh, duc hanh, duc dan
hai hau » hai chau, dai hau, hai hai
hai dau » han dau, hai dan, hang dau
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang x hoi. hieu ve cam ((duc danh) OR (duc manh)) thanh ((hai dau) OR (hai hau)) tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang x hoi. hieu ve cam ((duc danh) or (duc manh)) thanh ((hai dau) OR (hai hau)) tren~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu ve cam ((duc danh) or (duc manh)) thanh ((hai dau) OR (hai hau)) tren*.