Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
pham huu » pham duc, pham duy, phan huy
ban hanh » ban hang
ve triet » va trien, su triet
su sach » so sach, vu sach
hieu vu » hieu va, hieu ve, hieu su
vu pham » su pham, vi pham, vu kham
v nang » va nang, vu nang, van nang
x hoi » xa hoi, o hoi, x ho
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: ((su sach) or (vu khach)) v nang x hoi. hieu vu pham huu ((van ban) or (ban hanh)) vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu khach)) v nang x hoi. hieu vu pham huu ((van ban) OR (ban hanh)) vi ve triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu khach)) v nang x hoi. hieu vu pham huu ((van ban) or (ban hanh)) vi ve triet*.