Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
khach ky » hanh ky, thanh ky
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, le thanh
su triet » su viet, su tien, ve triet
van cau » van dau, van hau, van chat
va tinh » may tinh
va danh » va dinh, va dan, va hanh
cau tu » dau tu, cau truc

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu khach ky nang x ho. hieu van cau tu ((((va thanh) or (va tinh))) or (va danh)) ky su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ky nang x ho. hieu van cau tu ((((va thanh) OR (va tinh))) OR (va danh)) ky su triet.
• Adding a wildcard symbol may retrieve word variants: vu khach ky nang x ho. hieu van cau tu ((((va thanh) or (va tinh))) or (va danh)) ky su triet*.