Perhaps you should try some spelling variations:
doanh giai » doanh giao, doanh ngoai, doanh tai
hieu nghe » lieu nghe, hiem ngheo, nhiem nghe
vay doanh » van doanh, ly doanh, voi doanh
thuc vay » thuc vat, thuc day, thuc va
nam thuc » nam thuoc, am thuc, nam thu
nghe nam » nghe lam, nghiep nam, nghe nano
tu sach » thu sach, su sach, tu cach
giai ca » giai cac, giai cao, giai ma
te sach » toc sach
v nang » va nang, vu nang, van nang
y nang » ky nang, ly nang, may nang
ca tre » ca tren, cua tre, ca tru

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (te sach)) ((y nang) OR (v nang)) x ho. hieu nghe nam thuc vay doanh giai ca tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ((y nang) OR (v nang)) x ho. hieu nghe nam thuc vay doanh giai ca tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ((y nang) OR (v nang)) x ho. hieu nghe nam thuc vay doanh giai ca tre*.