Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vanh tai » van tai, hanh tai, vanh dai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang co » nang cao, nang doc, nang noi
qua cac » cua cac
anh tai » hanh tai, anh thai, xanh tai
co hoi » co hoc, co loi
xuc va » tuc va, luc va, xac va

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