Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
va thanh » gia thanh, ban thanh, va tinh
cau tren » cu tren, dau tren, ca tren
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va danh, ban hanh
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
ve cau » va cau, ve cac, le cau
di cau » da cau, diem cau
ke cau » ket 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 ky dang xa hoi. hieu ((ve cau) OR (ke cau)) phuc ((va hanh) OR (va thanh)) di cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky dang xa hoi. hieu ((ve cau) OR (ke cau)) phuc ((va hanh) or (va thanh)) di cau tren~".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky dang xa hoi. hieu ((ve cau) OR (ke cau)) phuc ((va hanh) or (va thanh)) di cau tren*.