Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
ky dinh » ky sinh, ky danh, my dinh
ky kinh » ly kinh, ky sinh, ket kinh
hieu va » hieu qua
cac tac » cac toc, cac bac, cac dac
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
tac va » tac da, tac xa, tuc va
di cua » dai cua, doi cua, de cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ky dinh) or (ky kinh)) van hoa. ((hieu va) or (lieu va)) cac tac va danh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky dinh) OR (ky kinh)) van hoa. ((hieu va) OR (lieu va)) cac tac va danh di cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky dinh) or (ky kinh)) van hoa. ((hieu va) or (lieu va)) cac tac va danh di cua te*.