Perhaps you should try some spelling variations:
sach doi » sach hoi, sach moi, sach dao
doi nang » dai nang, hoi nang, voi nang
hanh tai » thanh tai, hang tai, han tai
vu sach » vu bach, su sach, vu khach
hanh va » hang va, hanh vi
va chat » van chat, va phat, cao chat
va cham » va tham
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo
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: vu sach doi nang xa hoi. hieu ((va cham) OR (va chat)) xuc va ((hanh tai) or (hanh va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach doi nang xa hoi. hieu ((va cham) OR (va chat)) xuc va ((hanh tai) OR (hanh va)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach doi nang xa hoi. hieu ((va cham) OR (va chat)) xuc va ((hanh tai) or (hanh va)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: vu sach doi nang xa hoi. hieu ((va cham) OR (va chat)) xuc va ((hanh tai) or (hanh va)) cuu tre*.