Perhaps you should try some spelling variations:
than cua » nhan cua, thai cua, ban cua
khoa hoi » khoan hoi, khoa hoc, khoa doi
nam thuc » nam thuoc, am thuc, nam thu
hai cua » thai cua, dai cua, hoi cua
ky lang » ky nang, ky dang, ky tang
hoa hoi » hoa hoc, hoa doi, hoc hoi
hieu he » hieu ve, hiem he, hieu le
thuc va » thuc vat, thuc dan, thuc day
va nang » van nang, da nang, cam nang
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
he nam » ha nam, nghe nam

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 lang ((hoa hoi) or (khoa hoi)). hieu he nam thuc va nang ((hai cua) or (than cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang ((hoa hoi) OR (khoa hoi)). hieu he nam thuc va nang ((hai cua) OR (than cua)) viet.
• Adding a wildcard symbol may retrieve word variants: te sac ky lang ((hoa hoi) or (khoa hoi)). hieu he nam thuc va nang ((hai cua) or (than cua)) viet*.