Perhaps you should try some spelling variations:
nang than » nang thanh, sang than, nang phan
cua viet » ca viet, hoa viet, cua vat
thuc day » thuc dan, thuc vat
hang hoa » hang khoa, thanh hoa, hang va
than cua » nhan cua, thai cua, ban cua
ky hang » ky nang, ly hang, ky dang
hoa hoi » khoa hoi, hoa hoc, hoa doi
thuc va » thuc vat, thuc dan
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
le nam » ly nam, he nam, te nam
le na » le va, le ta, le ha

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 hang hoa hoi. hieu ((le nam) OR (le na)) ((thuc va) or (thuc day)) nang than cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky hang hoa hoi. hieu ((le nam) OR (le na)) ((thuc va) OR (thuc day)) nang than cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky hang hoa hoi. hieu ((le nam) OR (le na)) ((thuc va) or (thuc day)) nang than cua viet*".