Perhaps you should try some spelling variations:
sach hoi » sach moi, cach thoi, hoach hoi
sach doi » sach moi, sach dao, sach bai
hanh va » hang va
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
nang xa » nang x, lang xa, nang ma
ve cam » ve cham, ve cac, va cam
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: tu ((sach doi) OR (sach hoi)) nang xa hoi. hieu ve cam xuc va ((hanh vi) or (hanh va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach doi) OR (sach hoi)) nang xa hoi. hieu ve cam xuc va ((hanh vi) OR (hanh va)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach doi) OR (sach hoi)) nang xa hoi. hieu ve cam xuc va ((hanh vi) or (hanh va)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach doi) OR (sach hoi)) nang xa hoi. hieu ve cam xuc va ((hanh vi) or (hanh va)) cuu tre*.