Perhaps you should try some spelling variations:
dang xay » dang van, van xay
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, lang van
nam duc » nam duoc, pham duc, nam thuc
duc van » duc va, duc tan, duc manh
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: thu sach ty ((lang xa) or (dang xay)) hoi. lieu va nam duc van hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((lang xa) OR (dang xay)) hoi. lieu va nam duc van hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ty ((lang xa) or (dang xay)) hoi. lieu va nam duc van hanh di cua tre*.