Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
nang mai » nang ma, nang tai, lang mai
mai khoi » mai khoa, tai khoa, cac khoi
cam thuc » am thuc, nam thuc, cam thu
hoi cua » hoi chuc
hai cua » thai cua, dai cua, lai cua
vai cua » dai cua, lai cua, bai cua
so sach » so sanh, bo sach, co sach
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
sach v » sach va, sach y, sach 2
ve cam » ve cham, ve cac, va cam
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: so sach v nang mai khoi. hieu ve cam thuc va thanh ((vai cua) or (((hai cua) OR (hoi cua)))) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach v nang mai khoi. hieu ve cam thuc va thanh ((vai cua) OR (((hai cua) OR (hoi cua)))) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach v nang mai khoi. hieu ve cam thuc va thanh ((vai cua) or (((hai cua) OR (hoi cua)))) viet".
• Adding a wildcard symbol may retrieve word variants: so sach v nang mai khoi. hieu ve cam thuc va thanh ((vai cua) or (((hai cua) OR (hoi cua)))) viet*.