Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
sang ma » nang ma, sang tao, sang tai
xanh di » danh di, vanh dai, xanh tai
va xanh » va danh, va hanh, va anh
cac hoc » cach hoc, cac hop, bac hoc
tang ma » tang van
sach ky » sac ky, sach y, sach ty
di cua » dai cua, doi cua, de cua
ve cac » va cac, vien cac
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: tu sach ky ((((sang ma) OR (mang may))) OR (tang ma)) hoi. hieu ve cac hoc va xanh di cua te~.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((((sang ma) or (mang may))) or (tang ma)) hoi. hieu ve cac hoc va xanh di cua te*.