Perhaps you should try some spelling variations:
lang van » dang van, tang van, hoang van
hanh dai » hanh tai, hanh dao, vanh dai
so sach » so sanh, bo sach, co sach
long ha » dong ha, cong ha, dong hoa
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, va cam, ve cai
ve cac » va cac, vien cac
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: so sach y ((lang van) or (long ha)) hoi. hieu ((ve cam) OR (ve cac)) xuc va hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((lang van) OR (long ha)) hoi. hieu ((ve cam) OR (ve cac)) xuc va hanh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y ((lang van) or (long ha)) hoi. hieu ((ve cam) OR (ve cac)) xuc va hanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach y ((lang van) or (long ha)) hoi. hieu ((ve cam) OR (ve cac)) xuc va hanh dai cua tre*.