Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hoc nganh » hoc nhanh
cau tren » cu tren, dau tren, ca tren
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
coc loc » coc luc, chon loc
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
v nang » va nang, vu nang, van nang
ma hoi » mai hoi, xa hoi, ma hoa
va coc » va cuoc, va cac, va hoc
loc va » hoc va, luc va
di cau » da cau, diem cau

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: ((thuoc sach) OR (hoc nganh)) v nang ma hoi. hieu va coc loc va danh di cau tren~.
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (hoc nganh)) v nang ma hoi. hieu va coc loc va danh di cau tren*.