Perhaps you should try some spelling variations:
cau thuc » cau truc, cuu thuc, can thuc
va dinh » van dinh, va kinh, va tinh
thuc va » thuc vat, thuc dan, thuc day
hieu va » lieu va, hieu qua
va cau » van cau, va cac, va dau
sac ky » cac ky, sai ky
di cuu » di cua, dinh cuu
di cau » da cau, diem cau
vu sac » vu sach, vu san, va sac
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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) OR (o hoi)). hieu va cau thuc va dinh ((di cuu) or (di cau)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky nang ((x hoi) OR (o hoi)). hieu va cau thuc va dinh ((di cuu) OR (di cau)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ky nang ((x hoi) OR (o hoi)). hieu va cau thuc va dinh ((di cuu) or (di cau)) tre*".