Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, anh thai
cua viet » ca viet, hoa viet, cua vat
hanh tai » thanh tai, hang tai, han tai
nam thuc » nam thuoc, am thuc, nam thu
thuc van » thuc vat, thuc dan, thuc va
ky tang » ky nang, ky dang, kho tang
hoa hoi » khoa hoi, hoa hoc, hoc hoi
hoa doi » hoa dai, hoc doi, xoa doi
hieu ve » hieu va, hieu van
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ve nam » he nam, va nam, le nam

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

• 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 van ((hanh thai) OR (hanh tai)) cua viet~.
• 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 van ((hanh thai) OR (hanh tai)) cua viet~".
• Adding a wildcard symbol may retrieve word variants: te sac ky tang ((hoa hoi) or (hoa doi)). hieu ve nam thuc van ((hanh thai) OR (hanh tai)) cua viet*.