Perhaps you should try some spelling variations:
thanh van » thanh toan, thanh phan, thanh nhan
sach ly » sach y, sach ty, sach hay
sach lo » sach dao, sach doi, sach hoi
vang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc ((sach ly) OR (sach lo)) vang xa hoi. hieu va cam xuc va ((thanh van) or (thanh san)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc ((sach ly) OR (sach lo)) vang xa hoi. hieu va cam xuc va ((thanh van) OR (thanh san)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc ((sach ly) OR (sach lo)) vang xa hoi. hieu va cam xuc va ((thanh van) or (thanh san)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thuoc ((sach ly) OR (sach lo)) vang xa hoi. hieu va cam xuc va ((thanh van) or (thanh san)) cua tre*.