Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
thuc dan » thuc hanh, hoc dan, thuc vat
tu sach » thu sach, su sach, te sach
vai cua » dai cua, hai cua, lai cua
thuc va » thuc vat, thuc day
sach ty » sach y, sach tu, sach thu
hieu va » lieu va
hang xa » hoang xa, hang va, hang ca
ty hang » ly hang, ty xang, thi hang
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 ty hang xa hoi. ((hieu va) OR (hieu qua)) cau ((thuc va) OR (thuc dan)) hanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty hang xa hoi. ((hieu va) OR (hieu qua)) cau ((thuc va) OR (thuc dan)) hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty hang xa hoi. ((hieu va) OR (hieu qua)) cau ((thuc va) OR (thuc dan)) hanh vai cua tre*.