Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
va triet » va thiet, va trien, ve triet
dang cay » dang xay, dang ca, dang cac
cay phoi » cap phoi, tay hoi, cay cho
van dinh » van minh, van dich, va dinh
tu sach » thu sach, su sach, te sach
xuc van » duc van, luc van, vuc van
dinh vi » dinh ve, dinh viet, dinh tri
hieu va » lieu va, hieu qua
ky dang » ky nang, ky danh
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (hoc sach)) ky dang cay phoi. hieu va cam xuc van dinh vi ((va triet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (hoc sach)) ky dang cay phoi. hieu va cam xuc van dinh vi ((va triet) OR (hoa viet)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (hoc sach)) ky dang cay phoi. hieu va cam xuc van dinh vi ((va triet) or (hoa viet))*.