Perhaps you should try some spelling variations:
khanh hoa » thanh hoa, hang hoa
va khanh » van khanh, va thanh, vu khanh
hieu van » hieu va, thien van, lieu va
so sach » so sanh, bo sach, co sach
hoa cua » hoa chat, hoa xuat
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
lang xa » lang ha, dang xay, lang van
nang xa » nang x, mang xa, ang xa
van am » van nam, van lam, van dam

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y ((((nang xa) OR (lang xa))) or (nang ma)) hoi. hieu van am thuc va khanh hoa cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((((nang xa) OR (lang xa))) OR (nang ma)) hoi. hieu van am thuc va khanh hoa cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y ((((nang xa) OR (lang xa))) or (nang ma)) hoi. hieu van am thuc va khanh hoa cua tre*".