Perhaps you should try some spelling variations:
cau thuc » cau truc, cuu thuc, can thuc
vat dinh » va dinh, van dinh, vat sinh
hieu va » lieu va, hieu qua
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 vat dinh ((di cua) or (di cau)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky nang x hoi. hieu va cau thuc vat dinh ((di cua) OR (di cau)) tre*.