Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
duc van » duc va, duc tan, duc manh
hoc can » hoc dan, hoc cao, hoc cac
su viet » so viet
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky tang ma hoi. lieu va cac ((duc van) or (hoc can)) hanh vi ((cua triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky tang ma hoi. lieu va cac ((duc van) OR (hoc can)) hanh vi ((cua triet) OR (su viet)).
• Adding a wildcard symbol may retrieve word variants: te sac ky tang ma hoi. lieu va cac ((duc van) or (hoc can)) hanh vi ((cua triet) or (su viet))*.