Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
thue nang » thien nang, thuat nang, thi nang
toc sach » hoc sach, doc sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach thue nang x hoi. hieu va cam ((luc va) OR (tuc va)) hanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach thue nang x hoi. hieu va cam ((luc va) OR (tuc va)) hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach thue nang x hoi. hieu va cam ((luc va) OR (tuc va)) hanh vai cua tre*.