Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach kho » bach khoa, sach dao, sach nha
kho tang » cao tang
tang xa » trang xa, tang ma, lang xa
hieu va » lieu va, hieu qua
luc van » luoc van, luu van, luc va
duc van » duc va, duc tan, duc manh
anh dao » lanh dao, hanh dao, anh dat
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
va coc » va cuoc, va cac, va hoc

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