Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
thu sach » tu sach, thuat sach, thuoc sach
qua cham » qua hai, va cham, qua cua
su triet » su viet, su tien, ve triet
cao hoa » cao hoat, cao khoa, cau hoa
qua cac » cua cac
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang

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 y nang cao hoa. hieu ((qua cham) OR (qua cac)) thuc va hanh vi ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang cao hoa. hieu ((qua cham) OR (qua cac)) thuc va hanh vi ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang cao hoa. hieu ((qua cham) OR (qua cac)) thuc va hanh vi ((cua triet) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang cao hoa. hieu ((qua cham) OR (qua cac)) thuc va hanh vi ((cua triet) or (su triet))*.