Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
cua triet » su triet, va triet
va thanh » gia thanh, ban thanh, va tinh
cua viet » ca viet, hoa viet, cua vat
te sach » toc sach
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
ve cac » va cac, vien cac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (v nang)) ma hoa. hieu ve cac duc va thanh van ((cua triet) OR (cua viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) or (v nang)) ma hoa. hieu ve cac duc va thanh van ((cua triet) OR (cua viet))~".
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) or (v nang)) ma hoa. hieu ve cac duc va thanh van ((cua triet) OR (cua viet))*.