Perhaps you should try some spelling variations:
toc sach » doc sach, thuoc sach, nuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
va thanh » gia thanh, ban thanh, va tinh
va danh » va dinh, va dan, va hanh
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
dong ha » dong hoa, dong va, dong hoc
ky dong » ly dong, ky dang, ky cong
ha hoi » hoa hoi, ha noi, xa hoi
di cua » dai cua, doi cua, de cua
ve cac » va cac, vien cac

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) OR (hoc sach)) ky dong ha hoi. hieu ve cac xuc ((va thanh) or (va danh)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (hoc sach)) ky dong ha hoi. hieu ve cac xuc ((va thanh) OR (va danh)) di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (hoc sach)) ky dong ha hoi. hieu ve cac xuc ((va thanh) or (va danh)) di cua tre".
• Adding a wildcard symbol may retrieve word variants: ((toc sach) OR (hoc sach)) ky dong ha hoi. hieu ve cac xuc ((va thanh) or (va danh)) di cua tre*.