Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
danh va » doanh va, hanh va, anh va
va danh » va dinh, va dan, va hanh
de nhan » do nhan, tue nhan, de thanh
cuu tre » cua tre, cau tren, cau treo
ve nhan » ve nha, va 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.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ty xang) or (ly hang)) xa hoi. hieu ((ve nhan) OR (de nhan)) luc va danh va cuu tre~.
• 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 (de nhan)) luc va danh 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 (de nhan)) luc va danh va cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty xang) or (ly hang)) xa hoi. hieu ((ve nhan) OR (de nhan)) luc va danh va cuu tre*.