Perhaps you should try some spelling variations:
nam duoc » nam thuoc, da duoc, dat duoc
hieu van » hieu va, thien van, lieu va
hanh va » hang va, hanh vi
ma hanh » va hanh, da hanh, na hanh
duoc ma » duoc lam
cua tre » cua te, cuu tre, cua triet
sach ly » sach ty, sach hay, sach luu
sach lo » sach dao, sach doi, sach hoi
vang x » nang x
va cua » va chua, via cua, ca cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((((sach ly) OR (sach lo))) or (sach y)) vang x hoi. hieu van nam duoc ma hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((((sach ly) OR (sach lo))) OR (sach y)) vang x hoi. hieu van nam duoc ma hanh va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((((sach ly) OR (sach lo))) or (sach y)) vang x hoi. hieu van nam duoc ma hanh va cua tre".
• Adding a wildcard symbol may retrieve word variants: thu ((((sach ly) OR (sach lo))) or (sach y)) vang x hoi. hieu van nam duoc ma hanh va cua tre*.