Perhaps you should try some spelling variations:
cua triet » su triet, va triet
cua viet » ca viet, hoa viet, cua vat
vanh tai » van tai, hanh tai, anh tai
cham xuc » chat xuc, cham soc, pham duc
va vanh » va van, va danh, va hanh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
nang co » nang cao, nang doc, nang noi
co hoi » co hoc, co loi

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: tu sach ky nang co hoi. hieu va ((cham xuc) OR (cam xuc)) va vanh tai ((cua triet) OR (cua viet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang co hoi. hieu va ((cham xuc) OR (cam xuc)) va vanh tai ((cua triet) or (cua viet))~".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang co hoi. hieu va ((cham xuc) OR (cam xuc)) va vanh tai ((cua triet) or (cua viet))*.