Perhaps you should try some spelling variations:
luoc can » luc canh, hoc can, luoc dai
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
duc van » duc va, duc tan, duc manh
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 » dai cua, doi cua, de 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 (luoc can)) hanh ((vi cua) OR (di cua)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky nang xa hoi. hieu ve cac ((duc van) or (luoc can)) hanh ((vi cua) OR (di cua)) triet~".
• Adding a wildcard symbol may retrieve word variants: te sac ky nang xa hoi. hieu ve cac ((duc van) or (luoc can)) hanh ((vi cua) OR (di cua)) triet*.