Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
qua cam » qua cham, qua cac, qua ca
va vanh » va danh, va hanh, va anh
tai cua » thai cua, tai cuc, tri cua
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: tu sach ky nang x hoi. hieu qua cam xuc ((va vanh) or (va van)) tai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. hieu qua cam xuc ((va vanh) OR (va van)) tai cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. hieu qua cam xuc ((va vanh) or (va van)) tai cua triet*.