Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, thien van, lieu va
thanh di » thanh doi, thanh de, thanh do
cham xuc » cam xuc, chat xuc, cham soc
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va
sang ma » tang ma, nang ma, sang tao
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ty ((sang ma) or (van xay)) hoi. ((hieu ve) OR (hieu van)) cham xuc van thanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ty ((sang ma) OR (van xay)) hoi. ((hieu ve) OR (hieu van)) cham xuc van thanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ty ((sang ma) or (van xay)) hoi. ((hieu ve) OR (hieu van)) cham xuc van thanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: hoc sach ty ((sang ma) or (van xay)) hoi. ((hieu ve) OR (hieu van)) cham xuc van thanh di cua tre*.