Perhaps you should try some spelling variations:
sach doi » sach hoi, sach moi, sach dao
doi nang » dai nang, hoi nang, voi nang
hanh van » thanh van, khanh van, hanh san
tu sach » thu sach, su sach, te sach
hanh va » hang va, hanh vi
va cham » va chat, va tham
cuu tre » cua tre, cau tren, cau treo
ve cham » ve chat, vu cham, ve chim
nang xa » nang x, lang xa, nang ma
soc va » hoc va, loc va, doc 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 nang xa hoi. hieu ((ve cham) or (va cham)) soc va ((hanh van) or (hanh va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach doi nang xa hoi. hieu ((ve cham) OR (va cham)) soc va ((hanh van) OR (hanh va)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach doi nang xa hoi. hieu ((ve cham) or (va cham)) soc va ((hanh van) or (hanh va)) cuu tre*.