Perhaps you should try some spelling variations:
dau thuc » dan thuc, dai thuc, dam thuc
vat hanh » vat thanh, van hanh, va hanh
tu cach » tu cac
te sach » toc sach
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
va dau » va dao
vi cua » vai cua, di 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 cach) or (te sach)) ky ((nang xa) or (lang xa)) hoi. hieu va dau thuc vat hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (te sach)) ky ((nang xa) OR (lang xa)) hoi. hieu va dau thuc vat hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (te sach)) ky ((nang xa) or (lang xa)) hoi. hieu va dau thuc vat hanh vi cua tre*.