Perhaps you should try some spelling variations:
cam thuc » am thuc, nam thuc, cam thu
thai cua » than cua, tai cuc, tri cua
nang mai » nang ma, nang tai, lang mai
mai khoi » mai khoa, tai khoa, cac khoi
va thanh » gia thanh, ban thanh, va tinh
vai cua » dai cua, hai cua, lai cua
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
sach v » sach va, sach 2, sach vay
ve cam » ve cham, ve cac, va cam

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

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