Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
duc manh » suc manh, duc minh, duc tan
va triet » va thiet, va trien, ve triet
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
hanh di » hanh vi, hanh de, hang di
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
di va » dai va, di vao, doi 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: tu sac ky nang xa hoi. ((hieu van) OR (hieu va)) phat ((duc manh) OR (duc anh)) hanh di va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang xa hoi. ((hieu van) OR (hieu va)) phat ((duc manh) or (duc anh)) hanh di va triet~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. ((hieu van) OR (hieu va)) phat ((duc manh) or (duc anh)) hanh di va triet*.