Perhaps you should try some spelling variations:
cam thuc » am thuc, nam thuc, cam thu
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
cau tre » cau tren, cau treo, cau tra
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, va cam
di cau » da cau, diem cau
x hoi » o 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 (xa hoi)). hieu ve cam thuc va danh di cau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky nang ((x hoi) OR (xa hoi)). hieu ve cam thuc va danh di cau tre.
• Adding a wildcard symbol may retrieve word variants: vu sac ky nang ((x hoi) or (xa hoi)). hieu ve cam thuc va danh di cau tre*.