Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
ban xanh » ban hanh, ban anh, ban banh
xanh de » hanh de, xanh di, thanh de
xuc ban » duc ban, cuc ban, quoc ban
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
de cua » le cua, te cua, dieu cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky ((mang may) or (nang ma)) hoi. ((hieu van) or (hieu va)) cam xuc ban xanh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((mang may) OR (nang ma)) hoi. ((hieu van) OR (hieu va)) cam xuc ban xanh de cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((mang may) or (nang ma)) hoi. ((hieu van) or (hieu va)) cam xuc ban xanh de cua tre*.