Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
duc van » duc va, duc tan, duc manh
hoc can » hoc dan, hoc cao, hoc cac
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ve cac » va cac, vien cac
vi cua » vai cua, di cua

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 sac ky nang xa hoi. hieu ve cac ((duc van) OR (hoc can)) hanh vi cua triet~.
• Adding a wildcard symbol may retrieve word variants: te sac ky nang xa hoi. hieu ve cac ((duc van) or (hoc can)) hanh vi cua triet*.