Perhaps you should try some spelling variations:
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
ky danh » ky anh, ky dang
hieu va » lieu va, hieu qua
hanh va » hang va, hanh vi
ca viet » va viet, co viet, hoa viet
va am » va lam, va cam
va ca » va cac, va cao, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky danh ((le hoi) or (ma hoa)). hieu va am thuc van hanh va ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky danh ((le hoi) OR (ma hoa)). hieu va am thuc van hanh va ca viet.
• Adding a wildcard symbol may retrieve word variants: vu sach ky danh ((le hoi) or (ma hoa)). hieu va am thuc van hanh va ca viet*.