Perhaps you should try some spelling variations:
cau thuc » cau truc, cuu thuc, can thuc
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va dinh » van dinh, va kinh, va tinh
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky
va cau » van cau, va cac, va dau
di cua » dai cua, doi cua, de cua
di cau » da cau, diem cau
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sac ky nang x hoi. hieu va cau thuc va dinh ((di cua) OR (di cau)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ky nang x hoi. hieu va cau thuc va dinh ((di cua) OR (di cau)) tre*".