Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, thien van, lieu va
van tuan » van quan, van ban, anh tuan
cham xuc » cam xuc, chat xuc, cham soc
tuan di » tuan do, truan doi, quan doi
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 tuan 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 tuan 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 tuan di cua tre*.