Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
khach ky » hanh ky, thanh ky
cham cuu » cap cuu, chat cua
ban vanh » ban hanh, ban van, ban banh
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu ve » hieu va, hieu van
ban anh » ban hanh, ban banh, ban danh
cua tre » cua te, cuu tre, cua triet

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 dang xa hoi. hieu ve ((cham cuu) or (pham duc)) ((ban vanh) OR (ban anh)) dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ky dang xa hoi. hieu ve ((cham cuu) OR (pham duc)) ((ban vanh) OR (ban anh)) dai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khach ky dang xa hoi. hieu ve ((cham cuu) or (pham duc)) ((ban vanh) OR (ban anh)) dai cua tre*".