Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
hieu cua » hieu qua, dieu cua, bieu cua
hanh hai » thanh hai, nhanh hai, hang hai
su sach » so sach, vu sach
cac xuc » cam xuc, cac nuoc, chat xuc
va hanh » van hanh, va thanh, va danh
hai cau » hai chau, hai chu, hai hau
y nang » ky nang, ly nang, v nang
xuc va » duc va, tuc va, luc va
o hoi » co hoi, o hai, o hoa
o hoc » co hoc, mo hoc, so hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang ((o hoi) or (o hoc)). hieu cua cac xuc va hanh hai cau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ((o hoi) OR (o hoc)). hieu cua cac xuc va hanh hai cau triet.
• Adding a wildcard symbol may retrieve word variants: su sach y nang ((o hoi) or (o hoc)). hieu cua cac xuc va hanh hai cau triet*.