Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
hanh vai » hanh vi, hanh va, hanh tai
dien cac » vien cac, dien cuc, dien sach
hien cac » thien cac, vien cac, hieu cac
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
loc va » hoc 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: tu sach ky nang x hoi. thieu ((dien cac) or (hien cac)) loc va hanh vai ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. thieu ((dien cac) OR (hien cac)) loc va hanh vai ((cua triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang x hoi. thieu ((dien cac) or (hien cac)) loc va hanh vai ((cua triet) or (va triet))*.