Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
hieu va » hieu qua
danh ca » dan ca, doanh cua, danh cho
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » tuc va, luc va, xac va
ca cua » co 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: tu sach y nang ma hoi. ((hieu va) OR (lieu va)) cam ((xuc va) OR (duc va)) danh ca cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ma hoi. ((hieu va) or (lieu va)) cam ((xuc va) OR (duc va)) danh ca cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. ((hieu va) or (lieu va)) cam ((xuc va) OR (duc va)) danh ca cua tre*.