Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, cuoc cach, cuon sach
cua triet » cua viet, su triet, va triet
hoc sach » hoc sinh, hoc cac, hoc anh
chuc vat » thuc vat, chuc va, chuc van
vat hanh » vat thanh, van hanh, va hanh
ly nang » ky nang, ly hang, ly vang
v pham » d pham
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((nuoc sach) OR (hoc sach)) ly nang x hoi. hieu ((v pham) or (vi pham)) chuc vat hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((nuoc sach) OR (hoc sach)) ly nang x hoi. hieu ((v pham) OR (vi pham)) chuc vat hanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((nuoc sach) OR (hoc sach)) ly nang x hoi. hieu ((v pham) or (vi pham)) chuc vat hanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((nuoc sach) OR (hoc sach)) ly nang x hoi. hieu ((v pham) or (vi pham)) chuc vat hanh vi cua triet*.