Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
duc manh » suc manh, duc anh, duc minh
luoc can » luc canh, hoc can, luoc dai
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
vi cua » vai cua, di cua
te san » ke san, tu san, ta san
te ban » te bao
ve cac » va cac, vien cac

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

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