Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
cau tren » cu tren, dau tren, ca tren
hanh tai » thanh tai, hang tai, han tai
sang tao » hang tai
sang ma » tang ma, nang ma, mang may
hieu va » lieu va, hieu qua
va nham » va cham, va tham, va nha
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
tai cau » tai cac, tai cao
san ky » sang ky, van ky, dan ky
tu san » thu san, tu ban, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky ((sang tao) or (sang ma)) hoi. hieu va nham thuc va hanh tai cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky ((sang tao) OR (sang ma)) hoi. hieu va nham thuc va hanh tai cau tren.
• Adding a wildcard symbol may retrieve word variants: tu san ky ((sang tao) or (sang ma)) hoi. hieu va nham thuc va hanh tai cau tren*.