Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
cuu tre » cua tre, cau tren, cau treo
ve cac » va cac, vien cac
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: tu sach ty nang x hoi. hieu ve cac duc va danh vi ((((va triet) or (cua viet))) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu ve cac duc va danh vi ((((va triet) OR (cua viet))) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu ve cac duc va danh vi ((((va triet) or (cua viet))) or (cuu tre))*.