Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh doi » thanh doi, hanh noi, hang doi
dang xay » dang van, van xay
thuc van » thuc vat, thuc dan, thuc va
doi cua » dai cua, hoi cua, dong cua
duc van » duc va, duc tan, duc manh
tu sach » thu sach, su sach, te sach
van lam » van nam
sach ky » sac ky, sach y, sach ty
mang xa » lang xa, mang may, mang cua
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: tu sach ky ((mang xa) or (dang xay)) hoi. hieu van lam ((thuc van) or (duc van)) hanh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((mang xa) OR (dang xay)) hoi. hieu van lam ((thuc van) OR (duc van)) hanh doi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((mang xa) or (dang xay)) hoi. hieu van lam ((thuc van) or (duc van)) hanh doi cua tre*.