Perhaps you should try some spelling variations:
cau triet » cau trieu, su triet, cua triet
hanh hai » thanh hai, nhanh hai, hang hai
su sach » so sach, vu sach
qua cac » cua cac
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 qua cac xuc va hanh hai cau triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ((o hoi) OR (o hoc)). hieu qua 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 qua cac xuc va hanh hai cau triet*.