Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
nhan cua » nhat cua, nhan luc, nhan su
than cua » thai cua, ban cua, gian cua
va nhanh » va thanh, va hanh, va nhan
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
hoa doi » hoa dai, hoc doi, xoa doi
hoa hoi » khoa hoi, hoa hoc, hoc hoi
ky tang » ky nang, ky dang, kho tang
ve nam » he nam, va nam, le nam
sac ky » cac ky, sai ky
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky tang ((hoa hoi) or (hoa doi)). hieu ve nam thuc va nhanh ((than cua) OR (nhan cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky tang ((hoa hoi) OR (hoa doi)). hieu ve nam thuc va nhanh ((than cua) OR (nhan cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky tang ((hoa hoi) or (hoa doi)). hieu ve nam thuc va nhanh ((than cua) OR (nhan cua)) triet".
• Adding a wildcard symbol may retrieve word variants: te sac ky tang ((hoa hoi) or (hoa doi)). hieu ve nam thuc va nhanh ((than cua) OR (nhan cua)) triet*.