Perhaps you should try some spelling variations:
sang tao » hang tai
sach dao » lanh dao
hieu van » hieu va, thien van, lieu va
va doan » va doanh, van doan, va dan
cam luc » cam xuc, cau luc
van cam » van nam, van lam, van cau
sach lo » sach doi, sach hoi, sach moi
lang xa » lang ha, dang xay, lang van
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va
va cua » va chua, via cua, ca cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach lo) OR (sach dao)) ((lang xa) OR (sang tao)) hoi. hieu van cam luc va doan va cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach lo) OR (sach dao)) ((lang xa) or (sang tao)) hoi. hieu van cam luc va doan va cua tre~".
• Adding a wildcard symbol may retrieve word variants: vu ((sach lo) OR (sach dao)) ((lang xa) or (sang tao)) hoi. hieu van cam luc va doan va cua tre*.