Perhaps you should try some spelling variations:
thanh di » thanh doi, thanh de, thanh do
va thanh » gia thanh, ban thanh, va tinh
cam thuc » am thuc, nam thuc, cam thu
co sach » cuon sach, hoc sach
hieu ve » hieu va, hieu van
bo sach » hoc sach
thuc va » thuc vat, thuc dan, thuc day
di cua » dai cua, doi cua, de cua
ve cam » ve cham, ve cac, va cam
cua te » cua tu
ma hoi » mai hoi, ma hoa, me hoi
v nang » va nang, vu nang, van nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((co sach) or (bo sach)) v nang ((ma hoi) OR (xa hoi)). hieu ve cam thuc va thanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((co sach) OR (bo sach)) v nang ((ma hoi) OR (xa hoi)). hieu ve cam thuc va thanh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((co sach) or (bo sach)) v nang ((ma hoi) OR (xa hoi)). hieu ve cam thuc va thanh di cua te".
• Adding a wildcard symbol may retrieve word variants: ((co sach) or (bo sach)) v nang ((ma hoi) OR (xa hoi)). hieu ve cam thuc va thanh di cua te*.