Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
cao hoi » cau hoi, co hoi, cao hoc
dao duc » giao duc, tao duoc
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
da suu » dao suu, da su

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 cao hoi. lieu va ((da suu) or (dao duc)) va hanh vi ((cua viet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang cao hoi. lieu va ((da suu) OR (dao duc)) va hanh vi ((cua viet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: su sach y nang cao hoi. lieu va ((da suu) or (dao duc)) va hanh vi ((cua viet) or (va triet))*.