Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach ty » sach y, sach tu, sach thu
thuc va » thuc vat, thuc dan, thuc day
truc va » thuc vat, trung va
cua tre » cua te, cuu tre, cua triet
mang xa » lang xa, mang may, dang xay
ty mang » ty xang, ty hang, tin mang
va dai » va dao, va dau, va dap
anh va » hanh va
va cua » va chua, via cua, ca cua
vi dai » si dai, li dai, vien dai

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 ty mang xa hoi. hieu ((va dai) or (vi dai)) ((truc va) or (thuc va)) anh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty mang xa hoi. hieu ((va dai) OR (vi dai)) ((truc va) OR (thuc va)) anh va cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ty mang xa hoi. hieu ((va dai) or (vi dai)) ((truc va) or (thuc va)) anh va cua tre*.