Perhaps you should try some spelling variations:
vien canh » bien canh, vien can, vien nganh
hieu vien » hieu hien, hieu viec, thieu nien
nang xay » dang xay, nganh xay, nang xuan
thuc dan » thuc hanh, hoc dan, thuc vat
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
xay hoi » xa hoi, tay hoi, cay phoi
thuc va » thuc vat, thuc day
tinh va » tich va, trinh van, trinh vat
chu tre » cho tre, chu tri, cuu tre
va chu » va che, va cau, va chi

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 ky nang xay hoi. hieu vien canh ((thuc va) OR (thuc dan)) tinh va chu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xay hoi. hieu vien canh ((thuc va) OR (thuc dan)) tinh va chu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xay hoi. hieu vien canh ((thuc va) OR (thuc dan)) tinh va chu tre*.