Perhaps you should try some spelling variations:
cua triet » su triet, va triet
dinh hai » dinh thai, tinh hai, dinh ha
cua viet » ca viet, hoa viet, cua vat
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va dinh » van dinh, va kinh, va tinh
x hoi » xa hoi, o hoi, 5 hoi
ve am » va am

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky nang ((x hoi) or (x ho)). hieu ve am thuc va dinh hai ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang ((x hoi) OR (x ho)). hieu ve am thuc va dinh hai ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang ((x hoi) or (x ho)). hieu ve am thuc va dinh hai ((cua triet) OR (cua viet))".
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ((x hoi) or (x ho)). hieu ve am thuc va dinh hai ((cua triet) OR (cua viet))*.