Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
thu sach » tu sach, thuat sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
cua tre » cua te, cua triet, dua tren
sach ly » sach y, sach lo, sach ty
cuu tre » cau tren, cau treo
ly nang » ky nang, ly hang, ly vang
hieu va » lieu va, hieu qua
xuc va » duc va, tuc va, luc va
va cam » va cham, va cac, va cao
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ly nang ((x hoi) or (o hoi)). hieu va cam xuc va thanh van ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ly nang ((x hoi) OR (o hoi)). hieu va cam xuc va thanh van ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ly nang ((x hoi) or (o hoi)). hieu va cam xuc va thanh van ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: thu sach ly nang ((x hoi) or (o hoi)). hieu va cam xuc va thanh van ((cua tre) OR (cuu tre))*.