Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
tang van » dang van, hoang van, trong van
va thanh » gia thanh, ban thanh, va tinh
thanh vi » hanh vi, thanh va, thanh ve
dua tren » dung tren
tang ma » mang may
dao duc » giao duc, tao duoc
vi dua » vi du, vi dum, vi lua

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 y ((tang ma) OR (tang van)) hoi. lieu va ((cam xuc) OR (dao duc)) va thanh vi dua tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y ((tang ma) OR (tang van)) hoi. lieu va ((cam xuc) or (dao duc)) va thanh vi dua tren~".
• Adding a wildcard symbol may retrieve word variants: thu sach y ((tang ma) OR (tang van)) hoi. lieu va ((cam xuc) or (dao duc)) va thanh vi dua tren*.