Perhaps you should try some spelling variations:
lang hoa » hang hoa, lang ha, nang hoa
nghe nam » nghe lam, nghiep nam, nghe nano
vat hanh » vat thanh, van hanh, va hanh
ve triet » va trien, su triet
ky lang » ky nang, ky dang, ky tang
hoa doi » hoa dai, hoc doi, xoa doi
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
he nam » ha nam
kien » bien, vien, tien

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky lang hoa doi. hieu ((he nam) OR (nghe nam)) thuc vat hanh kem ((ve triet) or (su kien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky lang hoa doi. hieu ((he nam) OR (nghe nam)) thuc vat hanh kem ((ve triet) OR (su kien)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky lang hoa doi. hieu ((he nam) OR (nghe nam)) thuc vat hanh kem ((ve triet) or (su kien))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky lang hoa doi. hieu ((he nam) OR (nghe nam)) thuc vat hanh kem ((ve triet) or (su kien))*.