Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thu mang » thu hang, thu bang, thu dang
sach thu » sach thue, sach thieu, sach tham
hanh de » hanh ve, hanh kem
mang xa » lang xa, mang may, dang xay
hieu va » lieu va, hieu qua
va cham » va chat, va tham
hanh di » hanh vi, hang di, danh di
xuc va » tuc va, luc va, xac va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach thu mang xa hoi. hieu va cham ((xuc va) OR (duc va)) ((hanh di) or (hanh de)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach thu mang xa hoi. hieu va cham ((xuc va) OR (duc va)) ((hanh di) OR (hanh de)) cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach thu mang xa hoi. hieu va cham ((xuc va) OR (duc va)) ((hanh di) or (hanh de)) cua te*".