Perhaps you should try some spelling variations:
hanh vinh » thanh vinh, khanh vinh, hanh tinh
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, hieu ve
vinh cuu » dinh cuu, sinh cua, dinh cu
sach ty » sach y, sach tu, sach thu
ty hang » ly hang, ty xang, thi hang
luc van » luoc van, luu van, luc va
duc van » duc va, duc tan, duc manh
cuu tre » cua tre, cau tren, cau treo
hang o » hang do, hang o2, hoang o
o hoi » co hoi, o hoc, o hai

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: toc sach ty hang o hoi. ((hieu van) OR (lieu va)) cau ((luc van) OR (duc van)) hanh vinh cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty hang o hoi. ((hieu van) OR (lieu va)) cau ((luc van) or (duc van)) hanh vinh cuu tre~".
• Adding a wildcard symbol may retrieve word variants: toc sach ty hang o hoi. ((hieu van) OR (lieu va)) cau ((luc van) or (duc van)) hanh vinh cuu tre*.