Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
va nhan » van nhan, ca nhan, va phan
cuu tre » cua tre, cau tren, cau treo
ve nhan » ve nha, de nhan, ve phan
ly hang » ly quang
luc va » duc va, tuc va, loc va
va cuu » va cau, va chu, va huu

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: tu sach ((ty xang) OR (ly hang)) xa hoi. hieu ((ve nhan) OR (va nhan)) luc va hanh va cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty xang) or (ly hang)) xa hoi. hieu ((ve nhan) OR (va nhan)) luc va hanh va cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty xang) or (ly hang)) xa hoi. hieu ((ve nhan) OR (va nhan)) luc va hanh va cuu tre*.