Perhaps you should try some spelling variations:
chat thuc » thuat thuc, nhan thuc, chat thai
sach den » sach de, sach dung, mach dien
dang xay » dang van
hieu van » hieu va, thien van, lieu va
van chat » cao chat
thuc day » thuc dan, thuc vat
day hanh » day nhanh, day thanh, dao hanh
tu sach » thu sach, su sach, te sach
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: tu sach den ((dang xay) OR (van xay)) hoi. hieu van chat thuc day hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach den ((dang xay) OR (van xay)) hoi. hieu van chat thuc day hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach den ((dang xay) OR (van xay)) hoi. hieu van chat thuc day hanh vi cua tre*.