Perhaps you should try some spelling variations:
thanh dinh » thanh binh, thanh tinh, thanh vinh
toc sach » hoc sach, doc sach, thuoc sach
thanh de » hanh de, thanh ve, thanh do
cam tuc » cam tu, nam thuc, dam thuc
cua tre » cua te, cuu tre, cua triet
tang ma » mang may, tang van
hieu va » lieu va, hieu qua
sach v » sach va, sach y, sach 2
ma hoi » mai hoi, xa hoi, ma hoa
v tang » 6 tang, 7 tang, 5 tang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach v tang ma hoi. hieu va ((cam tuc) OR (cam xuc)) gia ((thanh dinh) or (thanh de)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach v tang ma hoi. hieu va ((cam tuc) OR (cam xuc)) gia ((thanh dinh) OR (thanh de)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach v tang ma hoi. hieu va ((cam tuc) OR (cam xuc)) gia ((thanh dinh) or (thanh de)) cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach v tang ma hoi. hieu va ((cam tuc) OR (cam xuc)) gia ((thanh dinh) or (thanh de)) cua tre*.