Perhaps you should try some spelling variations:
van nang » van quang, van dong, van dung
duc manh » suc manh, duc anh, duc minh
ve triet » va trien, su triet
tu bach » vu bach, tu cach, tu bac
hieu ve » hieu va, hieu van
luc van » luoc van, luu van, duc van
ve cam » ve cham, ve cac, va cam
vi ve » va ve, gi ve, ve ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu bach ((van nang) or (van ban)) xa hoi. hieu ve cam ((luc van) or (duc manh)) hanh vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu bach ((van nang) OR (van ban)) xa hoi. hieu ve cam ((luc van) OR (duc manh)) hanh vi ve triet.
• Adding a wildcard symbol may retrieve word variants: tu bach ((van nang) or (van ban)) xa hoi. hieu ve cam ((luc van) or (duc manh)) hanh vi ve triet*.