Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
duc danh » duc anh, duc hanh, duc dan
duc manh » suc manh, duc anh, duc minh
dat tren » dat trong, dua tren
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
hai dat » cai dat, hoi dat, hai dan
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 dat 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 dat tren*.