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
cham xuc » cam xuc, chat xuc, cham soc
tu sach » thu sach, su sach, te sach
hieu va » hieu qua
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: tu sach doi nang xa hoi. ((hieu va) OR (lieu va)) cham xuc va ((hanh tai) or (hanh vi)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach doi nang xa hoi. ((hieu va) OR (lieu va)) cham xuc va ((hanh tai) OR (hanh vi)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach doi nang xa hoi. ((hieu va) OR (lieu va)) cham xuc va ((hanh tai) or (hanh vi)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach doi nang xa hoi. ((hieu va) OR (lieu va)) cham xuc va ((hanh tai) or (hanh vi)) cuu tre*.