Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
thu sach » tu sach, thuat sach, thuoc sach
su triet » su viet, su tien, ve triet
sach ly » sach y, sach lo, sach ty
nang xa » nang x, lang xa, nang ma
thuc va » thuc vat, thuc dan, thuc day
ly nang » ky nang, ly hang, ly vang
va cam » va cham, va cac, va cai
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ly nang xa hoi. hieu ((va cam) or (va cao)) thuc va dan vi ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ly nang xa hoi. hieu ((va cam) OR (va cao)) thuc va dan vi ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ly nang xa hoi. hieu ((va cam) or (va cao)) thuc va dan vi ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: thu sach ly nang xa hoi. hieu ((va cam) or (va cao)) thuc va dan vi ((cua triet) OR (su triet))*.