Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » lang xa, nang ma, mang xa
cua van » cua ban, cua dan, cua can
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
va nam » van nam, ha nam, va nay
di cua » dai cua, doi cua, de cua

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 ((nang xa) or (nang x)) hoi. lieu va nam ((cua van) or (cua vat)) hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang xa) OR (nang x)) hoi. lieu va nam ((cua van) OR (cua vat)) hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang xa) or (nang x)) hoi. lieu va nam ((cua van) or (cua vat)) hanh di cua tre*.