Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
cua triet » cua viet, su triet, va triet
vanh dai » van dai, vanh tai, lanh dao
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
va nham » va cham, va tham, va nha
thuc va » thuc vat, thuc dan, thuc day
van tai » von tai, van tuan

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 dang xa hoi. lieu va nham thuc va ((vanh dai) or (van tai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky dang xa hoi. lieu va nham thuc va ((vanh dai) OR (van tai)) cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach ky dang xa hoi. lieu va nham thuc va ((vanh dai) or (van tai)) cua triet*.