Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
thue nang » thien nang, thuat nang, thi nang
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
hanh vai » hanh va, hanh tai, hanh van
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, dua tren
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
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 xuc va ((hanh vai) or (hanh vi)) ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach thue nang x hoi. hieu va cam xuc va ((hanh vai) OR (hanh vi)) ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: toc sach thue nang x hoi. hieu va cam xuc va ((hanh vai) or (hanh vi)) ((cua tre) or (cua triet))*.