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
hieu ve » hieu van
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
nang xa » nang x, lang xa, nang ma
su sach » so sach, vu sach

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 ky nang xa hoi. ((hieu ve) or (hieu va)) cac thuc va danh vi ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. ((hieu ve) OR (hieu va)) cac thuc va danh vi ((cua triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. ((hieu ve) or (hieu va)) cac thuc va danh vi ((cua triet) or (va triet))*.