Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
tang xa » trang xa, lang xa, tang ha
tang ma » mang may, tang van
sach ty » sach y, sach tu, sach thu
cac loc » cac lop, cac toc, cac hoc
va dinh » van dinh, va kinh, vu dinh
va tinh » may tinh
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ty ((tang xa) OR (tang ma)) hoi. lieu va cac loc ((va dinh) or (va tinh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ty ((tang xa) OR (tang ma)) hoi. lieu va cac loc ((va dinh) OR (va tinh)) dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ty ((tang xa) OR (tang ma)) hoi. lieu va cac loc ((va dinh) or (va tinh)) dai cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ty ((tang xa) OR (tang ma)) hoi. lieu va cac loc ((va dinh) or (va tinh)) dai cua tre*.