Perhaps you should try some spelling variations:
sach dao » lanh dao
va hanh » van hanh, va thanh, va danh
sach lo » sach doi, sach hoi, sach moi
va cao » va cac, va co, va dao
vi cua » vai cua, di cua
luc va » duc va, tuc va, loc va
va cam » va cham, va cac, va cai
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach lo) or (sach dao)) nang x hoi. hieu ((va cam) or (va cao)) luc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach lo) OR (sach dao)) nang x hoi. hieu ((va cam) OR (va cao)) luc va hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: thu ((sach lo) or (sach dao)) nang x hoi. hieu ((va cam) or (va cao)) luc va hanh vi cua te*.