Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
vu khach » vu khanh, vu khac, vay khach
thuc van » thuc vat, thuc dan, thuc va
khach ky » hanh ky, thanh ky
hieu ve » hieu va, hieu van
ky dang » ky nang, ky danh
me hoi » le hoi
va cai » va cac, va bai, va dai
va ca » va cac, va cao, va cau
ve am » va am

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 ((me hoi) or (ma hoa)). hieu ve am thuc van thanh ((va ca) OR (va cai)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ky dang ((me hoi) OR (ma hoa)). hieu ve am thuc van thanh ((va ca) OR (va cai)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khach ky dang ((me hoi) or (ma hoa)). hieu ve am thuc van thanh ((va ca) OR (va cai)) viet".
• Adding a wildcard symbol may retrieve word variants: vu khach ky dang ((me hoi) or (ma hoa)). hieu ve am thuc van thanh ((va ca) OR (va cai)) viet*.