Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van nang » van quang, van ban, van dong
hanh lam » thanh lap, hanh kem, dinh lam
cham xuc » cam xuc, chat xuc, cham soc
sach van » sach han, sach va, bach van
hanh va » hang va, hanh vi
tu sach » thu sach, su sach, te sach
hieu ve » hieu va
nang co » nang cao, nang doc, nang noi
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
co hoi » co hoc, co loi

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 van nang co hoi. ((hieu ve) OR (hieu van)) cham xuc va ((hanh lam) or (hanh va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach van nang co hoi. ((hieu ve) OR (hieu van)) cham xuc va ((hanh lam) OR (hanh va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach van nang co hoi. ((hieu ve) OR (hieu van)) cham xuc va ((hanh lam) or (hanh va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach van nang co hoi. ((hieu ve) OR (hieu van)) cham xuc va ((hanh lam) or (hanh va)) cua tre*.