Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
ban anh » ban hanh, ban banh, ban danh
nam cau » nam cao, nam cac, nam ca
nam cuu » nam cua, nam suu, cham cuu
lang xa » lang ha, dang xay, lang van
ty lang » tay lang, ty xang, ty hang
vu sach » vu bach, su sach, vu khach
anh vi » hanh vi, anh va, anh ve
vi cua » vai cua, di cua
cua te » cua tu

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: ((thu sach) OR (vu sach)) ty lang xa hoi. hieu van ((nam cuu) OR (nam cau)) ban anh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (vu sach)) ty lang xa hoi. hieu van ((nam cuu) OR (nam cau)) ban anh vi cua te~".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (vu sach)) ty lang xa hoi. hieu van ((nam cuu) OR (nam cau)) ban anh vi cua te*.