Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
thuc day » thuc dan
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
cua tre » cua te, cuu tre, cua triet
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: su sach ly nang x ho. hieu van cham ((thuc day) OR (thuc vat)) hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly nang x ho. hieu van cham ((thuc day) OR (thuc vat)) hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ly nang x ho. hieu van cham ((thuc day) OR (thuc vat)) hanh vi cua tre*.