Perhaps you should try some spelling variations:
duc manh » suc manh, duc anh, duc minh
luoc can » hoc can, luoc dai, duoc cac
cua viet » ca viet, hoa viet, cua vat
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
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.

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky nang xa hoi. hieu ve cac ((duc manh) or (((luoc can) OR (luc canh)))) hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang xa hoi. hieu ve cac ((duc manh) OR (((luoc can) OR (luc canh)))) hanh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang xa hoi. hieu ve cac ((duc manh) or (((luoc can) OR (luc canh)))) hanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang xa hoi. hieu ve cac ((duc manh) or (((luoc can) OR (luc canh)))) hanh vi cua viet*.