Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
te sach » toc sach
xang xa » lang xa, mang xa, ang xa
van cau » van dau, van hau, van chat
luc van » luoc van, luu van, luc va
duc van » duc va, duc tan, duc manh
cuu tre » cua tre, cau tren, cau treo
anh vi » hanh vi, anh va, anh ve
vi cuu » vi luu, vinh cuu

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) or (te sach)) ty xang xa hoi. hieu van cau ((luc van) OR (duc van)) anh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (te sach)) ty xang xa hoi. hieu van cau ((luc van) OR (duc van)) anh vi cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (te sach)) ty xang xa hoi. hieu van cau ((luc van) OR (duc van)) anh vi cuu tre*".