Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
cac thuc » cach thuc, cac thu, can thuc
vat danh » va danh, van danh, luat danh
hieu van » hieu va, thien van, lieu va
danh vi » hanh vi, dinh vi, danh di
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
van cac » van hac, van cau, van bac

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y ((nang xa) or (nang cao)) hoi. hieu van cac thuc vat danh vi ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y ((nang xa) OR (nang cao)) hoi. hieu van cac thuc vat danh vi ((cua triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: so sach y ((nang xa) or (nang cao)) hoi. hieu van cac thuc vat danh vi ((cua triet) or (va triet))*.