Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
ly nang » ky nang, ly hang, ly vang
sach ly » sach y, sach lo, sach ty
cam luc » cam xuc, cau luc
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, dua tren
van cam » van nam, van lam, van cau
luc va » duc va, tuc va, loc va
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

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

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