Perhaps you should try some spelling variations:
thuat sang » thuat song, thuat san, thuat bang
nang xay » dang xay, nganh xay, nang xuan
cam thuc » am thuc, nam thuc, cam thu
vat hanh » vat thanh, van hanh, va hanh
cua viet » ca viet, hoa viet, cua dieu
sang ky » sang kyo, dang ky, tang ky
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » lieu va, hieu qua
hanh di » hanh vi, hanh de, hang di
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sang ky nang xay hoi. hieu va cam thuc vat hanh di ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sang ky nang xay hoi. hieu va cam thuc vat hanh di ((cua viet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: thuat sang ky nang xay hoi. hieu va cam thuc vat hanh di ((cua viet) or (cua vat))*.