Perhaps you should try some spelling variations:
thanh luc » than luc, nhan luc, thanh lap
thanh luu » thanh lieu, thanh ngu, thanh lap
hanh hai » thanh hai, nhanh hai, hang hai
hieu van » hieu va, thien van, lieu va
hai cua » thai cua, dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
nang ma » tang ma, sang ma, nang cao
sach va » sach xa, sach ha, sach dao
cua tre » cua te, cuu tre, cua triet
sach v » sach y, sach 2, sach vay

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 v) OR (sach va)) nang ma hoa. hieu van ((thanh luc) OR (thanh luu)) va hanh hai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach v) OR (sach va)) nang ma hoa. hieu van ((thanh luc) or (thanh luu)) va hanh hai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach v) OR (sach va)) nang ma hoa. hieu van ((thanh luc) or (thanh luu)) va hanh hai cua tre*.