Perhaps you should try some spelling variations:
dinh dat » dinh ket, dinh van, dinh lam
dinh dai » sinh dai, dinh dao, dinh tai
cua tre » cua te, cuu tre, cua triet
cac tuc » cac toc, cac tu, cac tac
hieu va » lieu va, hieu qua
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa
vu hai » su hai, vu ha
vu sai » vu san, vu dai, vu tai

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: ((vu sai) OR (vu hai)) ky tang ma hoi. hieu va cac tuc va ((dinh dai) OR (dinh dat)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sai) OR (vu hai)) ky tang ma hoi. hieu va cac tuc va ((dinh dai) or (dinh dat)) cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((vu sai) OR (vu hai)) ky tang ma hoi. hieu va cac tuc va ((dinh dai) or (dinh dat)) cua tre*.